Factors – All Factors of a Number

Factors are the numbers that are exactly divisible by the given original number, which means that they divide the original number leaving nothing as a remainder.

Factors of any number

Figure 1 – Group of 6 students have been divided into 2 groups with 3 student each

The word “Factor” has been derived from the Latin word “faitor” which means creator or doer. The factor is a divisor of a given number. Factors are important because they allow you to break a number down into smaller parts. When two whole numbers are multiplied together, they are regarded as the factors of the resulting product.

For instance, the product of two whole numbers 2 and 3 is given as:

\[ 2 \times 3 = 6 \]

such that 2 and 3 are the factors of 6.

The Factoring technique has so many uses in real life! You can use it to find the factors of something, which will allow you to divide everything into equal parts or maybe in various real-life instances such as when exchanging money or understanding time while on vacation.

Factoring comes up with all kinds of solutions for problems like these which must sound too complex right now but wait until we get more specific about how factored things are and how it is done.

What Are Factors?

Factors are the numbers that divide the other number such that the remaining number is zero.

Factors can be determined using the division or multiplication method. In addition to these two methods, rules of divisibility can also be used to find the factors of any given number. Factors are not only in the form of numbers but they can also be the algebraic expressions dividing another expression equally.

Factors can be positive as well as negative. The negative factors are the same as positive ones with the opposite sign.

To better understand the concept of finding factors, let’s just find the factors of number 8.

8 can be factored as following:

\[ 1 \times 8 = 8 \]

\[ 2 \times 4 = 8 \]

Therefore, 8 can be factored in as 1, 2, 4, and 8 since we have already learned earlier that the negative factors are nothing but positive factors with opposite signs. So the negative factors are -1, -2, -4, and -8.

The product of two negative numbers is always a positive number where 8 is the positive number, so the factors of 8 are given as:

\[ 1, -1, 2, -2, 4, -4, 8, -8 \]

Usually, the positive factors are considered while solving the problems related to factorization.

How To Find the Factors of a Number

To find the factors of any number, follow the steps mentioned below:

Step 1

Perform the prime factorization of the number whose factors are to be determined.

Step 2

Draw a factor tree for the number. All the numbers originating from the new branches are the factors of the given number.

Step 3

Now, multiply any two of the obtained prime factors to find the other factors of the number.

Step 4

Do not repeat the factors in the list.

Let’s solve an example to understand the method better.

For instance, find the factors of 136 using prime factorization.

The prime factorization of 136 is given as:

Factors tree of one thirty six

Figure 2 – Factor tree of 136 using prime factorization

Now, write the prime factors in the exponent form as:

\[ Prime\ Factor\ of\ 136\ = 2 \times 2 \times 2 \times 17 \]

So, the factors of 136 are:

1, 2, 4, 8, 17, 34, 68, and 136.

Here are some important properties of the factors of the number:

  1. The factors of the number are either less than or equal to the given number in magnitude.
  2. If a number is the factor of a given number then its additive inverse will also be the factor of the number.
  3. The total number of factors is always finite.
  4. The factors of a number can neither be in decimal form nor fractions.
  5. The factors can be found by using the multiplication or division method.
  6. Every number has at least two factors i.e. 1 and the number itself.
  7. only 1 and 0 has 1 factor.

There are other methods such as the multiplication and division methods that can be used to determine the factors of the given number.

Let’s explore each of the methods individually for a better understanding of the concept.

Multiplication Method

To find the factors of the number using the multiplication method, follow the steps given below:

Step 1

Express the given number in the form of the product of two whole numbers.

Step 2

Make all the possible pairs that give the number as the product.

Step 3

The whole numbers whose product is equal to the given number are the factors of that number.

For instance, the factors of 36 using the multiplication method are given as:

\[ 1 \times 36 = 36 \]

\[ 2 \times 18 = 36 \]

\[ 3 \times 12 = 36 \]

\[ 4 \times 9 = 36 \]

\[ 6 \times 6 = 36 \]

Therefore, the factors of 36 found using the multiplication method are:

\[ Factors\ of\ 36 = 1, 2, 3, 4, 6, 9, 12, 18, 36 \]

Division Method

To compute the factors of a number using the division method, follow the steps mentioned below:

Step 1

Make a list of numbers less than the given number whose factors are to be found.

Step 2

Divide each number by the given number.

Step 3

The numbers that when divided give zero as the remainder are the factors of the number.

For example, the factors of 8 found using the division method are:

\[ \dfrac{8}{1} = 8,\ r=0 \]

\[ \dfrac{8}{2} = 4,\ r=0 \]

\[ \dfrac{8}{3} = 2,\ r=2 \]

\[ \dfrac{8}{4} = 2,\ r=0 \]

\[ \dfrac{8}{5} = 1,\ r=3 \]

Therefore, the factors of 8 are given as:

\[ Factors\ of\ 8 = 1, 2, 4, 8\]

The factors can be in the form of algebraic expressions as well. The algebraic factors can be found using various techniques such as factoring quadratic expressions or polynomials.

Hence factors and multiples are very important mathematical concepts that are used for solving many problems

Factors of All the Numbers

Below is the list of factors of various numbers. Now, you do not have to worry about finding the factors of various numbers be it simple or complex, the solution is just one click away.


factors of -40factors of 224factors of 54
factors of -48factors of 225factors of 55
factors of -6factors of 23factors of 56
factors of 10factors of 24factors of 57
factors of 100factors of 240
factors of 105factors of 25factors of 58
factors of 108factors of 252factors of 6
factors of 11factors of 26factors of 60
factors of 112factors of 27
factors of 119factors of 28factors of 61
factors of 12factors of 289factors of 62
factors of 120factors of 29
factors of 121factors of 3factors of 63
factors of 125factors of 30factors of 64
factors of 126factors of 300factors of 65
factors of 128factors of 31factors of 66
factors of 13factors of 32factors of 67
factors of 130factors of 33factors of 68
factors of 135factors of 336factors of 69
factors of 136factors of 34factors of 7
factors of 14factors of 35factors of 70
factors of 140factors of 36factors of 72
factors of 144factors of 37factors of 73
factors of 147factors of 38factors of 74
factors of 15factors of 384factors of 75
factors of 150factors of 39factors of 76
factors of 16factors of 4factors of 77
factors of 160factors of 40factors of 78
factors of 162factors of 41factors of 8
factors of 168factors of 42factors of 80
factors of 169factors of 43factors of 81
factors of 17factors of 432factors of 83
factors of 176factors of 44factors of 84
factors of 18factors of 45factors of 85
factors of 180factors of 46factors of 87
factors of 19factors of 47factors of 88
factors of 192factors of 48factors of 89
factors of 196factors of 49factors of 9
factors of 2factors of 5factors of 90
factors of 20factors of 50
factors of 200factors of 500factors of 91
factors of 21factors of 51factors of 93
factors of 210factors of 512factors of 94
factors of 216factors of 52factors of 96
factors of 22factors of 53factors of 98
  factors of 99

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