Factors of 845: Prime Factorization, Methods, and Examples

Positive and negative factors of 845 exist. When one of these factors serves as the dividend and the other as the divisor, the quotient is a whole integer with zero residues, indicating that the factors have been distributed equally.

Factors Of 845

Factors of 845

Here are the factors of number 845.

Factors of 845:  1, 5, 13, 65, 169 and 845

Negative Factors of 845

The negative factors of 845 are similar to their positive aspects, just with a negative sign.

Negative Factors of 845:-1, -5, -13, -65, -169 and -845

Prime Factorization of 845

The prime factorization of 845 is the way of expressing its prime factors in the product form.


Prime Factorization: 51 x 132

In this article, we will learn about the factors of 845 and how to find them using various techniques such as upside-down division, prime factorization, and factor tree.

What Are the Factors of 845?

The factors of 845 are 1, 5, 13, 65, 169, and 845. These numbers are the factors as they do not leave any remainder when divided by 845.

The factors of 845 are classified as prime numbers and composite numbers. The prime factors of the number 845 can be determined using the prime factorization technique.

How To Find the Factors of 845?

You can find the factors of 845 by using the rules of divisibility. The divisibility rule states that any number, when divided by any other natural number, is said to be divisible by the number if the quotient is the whole number and the resulting remainder is zero.

To find the factors of 845, create a list containing the numbers that are exactly divisible by 845 with zero remainders. One important thing to note is that 1 and 845 are the 845’s factors as every natural number has 1 and the number itself as its factor.

1 is also called the universal factor of every number. The factors of 845 are determined as follows:

\[\dfrac{ 845}{1} = 845\]

\[\dfrac{ 845}{5} = 169\]

\[\dfrac{ 845}{13} = 65\]

\[\dfrac{ 845}{65} = 13\]

\[\dfrac{ 845}{169} = 5\]

\[\dfrac{ 845}{ 845} = 1\]

Therefore, 1, 5, 13, 65, 169, and 845 are the factors of 845.

Total Number of Factors of 845

For 845, there are 6 positive factors and 6 negative ones. So in total, there are 12 factors of 845. 

To find the total number of factors of the given number, follow the procedure mentioned below:

  1. Find the factorization/prime factorization of the given number.
  2. Demonstrate the prime factorization of the number in the form of exponent form.
  3. Add 1 to each of the exponents of the prime factor.
  4. Now, multiply the resulting exponents together. This obtained product is equivalent to the total number of factors of the given number.

By following this procedure, the total number of factors of 845 is given as:

The factorization of 845 is 1 x 51 x 132.

The exponent of 1 is 1, 5 is 1, and 13 is 2.

Adding 1 to each and multiplying them together results in 12.

Therefore, the total number of factors of 845 is 12. 6 are positive, and 6 factors are negative.

Important Notes

Here are some essential points that must be considered while finding the factors of any given number:

  • The factor of any given number must be a whole number.
  • The factors of the number cannot be in the form of decimals or fractions.
  • Factors can be positive as well as negative.
  • Negative factors are the additive inverse of the positive factors of a given number.
  • The factor of a number cannot be greater than that number.
  • Every even number has 2 as its prime factor, the smallest prime factor.

Factors of 845 by Prime Factorization

The number 845 is a composite number. Prime factorization is a valuable technique for finding the number’s prime factors and expressing the number as the product of its prime factors.

Prime factorization of 845 2

Before finding the factors of 845 using prime factorization, let us find out what prime factors are. Prime factors are the factors of any given number that are only divisible by 1 and themselves.

To start the prime factorization of 845, start dividing by its most minor prime factor. First, determine that the given number is either even or odd. If it is an even number, then 2 will be the smallest prime factor.

Continue splitting the quotient obtained until 1 is received as the quotient. The prime factorization of 845 can be expressed as:

 845 = 51 x 132

Factors of 845 in Pairs

The factor pairs are the duplet of numbers that, when multiplied together, result in the factorized number. Factor pairs can be more than one depending on the total number of factors given.

Factors of 845 in pairs 1


For 845, the factor pairs can be found as:

1 x 845 = 845

5 x 169 = 845

13 x 65 = 845

The possible factor pairs of 845 are given as (1, 845),(5, 169), and (13, 65).

All these numbers in pairs, when multiplied, give 845 as the product.

The negative factor pairs of 845 are given as:

-1 x – 845 = 845

-5 x -169 = 845

-13 x -65 = 845

It is important to note that in negative factor pairs, the minus sign has been multiplied by the minus sign, due to which the resulting product is the original positive number. Therefore, -1, -5, -13, -65, -169 and -845 are called negative factors of 845.

The list of all the factors of 845, including positive as well as negative numbers, is given below.

Factor list of 845: 1,-1, 5,-5, 13,-13, 65,-65, 169,-169, 845, and – 845

Factors of 845 Solved Examples

To better understand the concept of factors, let’s solve some examples.

Example 1

How many factors of 845 are there?


The total number of Factors of 845 is 12.

Factors of 845 are 1, 5, 13, 65, 169, and 845.

Example 2

Find the factors of 845 using prime factorization.


The prime factorization of 845 is given as:

 845 $\div$ 5 =169

169 $\div$ 13 =13

13 $\div$ 13 = 1 

So the prime factorization of 845 can be written as:

51 x 132 = 845

Factors of 844|Factors List| Factors of 846