Factors of 851: Prime Factorization, Methods, and Examples

Four factors, or two-factor pairs, make up the number 851. A number’s components are always smaller than the number itself. The two primary variables of 851 are 23 and 37. 

Factors Of 851

The factors of a number that can only be divided by one are known as prime factors.

Factors of 851

Here are the factors of number 851.

Factors of 851:  1, 23, 37 and 851

Negative Factors of 851

The negative factors of 851 are similar to its positive aspects, just with a negative sign.

Negative Factors of 851: -1, -23, -37 and -851

Prime Factorization of 851

The prime factorization of 851 is the way of expressing its prime factors in the product form.


Prime Factorization:  231 x 371

In this article, we will learn about the factors of 851 and how to find them using various techniques such as upside-down division, prime factorization, and factor tree.

What Are the Factors of 851?

The factors of 851 are  1, 23, 37, and 851. These numbers are the factors as they do not leave any remainder when divided by 851.

The factors of 851 are classified as prime numbers and composite numbers. The prime factors of the number 851 can be determined using the prime factorization technique.

How To Find the Factors of 851?

You can find the factors of 851 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 851, create a list containing the numbers that are exactly divisible by 851 with zero remainders. One important thing to note is that 1 and 851 are the 851’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 851 are determined as follows:

\[\dfrac{851}{1} = 851\]

\[\dfrac{8511}{23} = 37\]

\[\dfrac{851}{37} = 23\]

\[\dfrac{851}{851} = 1\]

Therefore,  1, 23, 37, and 851 are the factors of 851.

Total Number of Factors of 851

For 851, there are 4 positive factors and 4 negative ones. So in total, there are 8 factors of 851. 

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 851 is given as:

Factorization of 851 is 1 x  231 x 371.

The exponent of 1, 23, and 37 is 1.

Adding 1 to each and multiplying them together results in 8.

Therefore, the total number of factors of 851 is 8. 4 is positive, and 4 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 851 by Prime Factorization

The number 851 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 851 3

Before finding the factors of 851 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 851, 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 851 can be expressed as:

851 =  231 x 371

Factors of 851 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 851 in pairs 1


For 851, the factor pairs can be found as:

1 x 851 = 851

 23 x 37= 851

The possible factor pairs of 851 are given as (1, 851) and ( 23, 37).

All these numbers in pairs, when multiplied, give 851 as the product.

The negative factor pairs of 851 are given as:

-1 x -851 = 851

-23 x -37= 851

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, -23, -37, and -851 are called negative factors of 851.

The list of all the factors of 851, including positive as well as negative numbers, is given below.

Factor list of 851: 1,-1,23, -23,37, -37, 851, and -851

Factors of 851 Solved Examples

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

Example 1

How many factors of 851 are there?


The total number of Factors of 851 is 8.

Factors of 851 are  1, 23, 37 and 851

Example 2

Find the factors of 851 using prime factorization.


The prime factorization of 851 is given as:

851 $\div$ 23 = 37

37 $\div$ 37 = 1 

So the prime factorization of 851 can be written as:

 231 x 371 = 851

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