Factors of 921: Prime Factorization, Methods, and Examples

The factors of 921 are numbers that, when divided by 921, give zero as the remainder. This means the numbers that ultimately divide the given number are named as their factors. The given number’s factors can be positive and negative. 

Factors Of 921

We can explore more abut factors of 921 in this article.

Factors of 921

Here are the factors of number 921.

Factors of 921: 1, 3, 307, and 921.

Negative Factors of 921

The negative factors of 921 are similar to its positive aspects, just with a negative sign.

Negative Factors of 921: –1, -3, -307, and -921

Prime Factorization of 921

The prime factorization of 921 is the way of expressing its prime factors in the product form.

Prime Factorization: 3 x 307

In this article, we will learn about the factors of 921 and how to find them using various techniques such as upside-down division, prime factorization, and factor tree.

What Are the Factors of 921?

The factors of 921 are 1, 3, 307, and 921. These numbers are the factors as they do not leave any remainder when divided by 921.

The factors of 921 are classified as prime numbers and composite numbers. The prime factors of the number 921 can be determined using the prime factorization technique.

How To Find the Factors of 921?

You can find the factors of 921 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 921, create a list containing the numbers that are exactly divisible by 921 with zero remainders. One important thing to note is that 1 and 921 are the 921’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 921 are determined as follows:

\[\dfrac{921}{1} = 921\]

\[\dfrac{921}{3} = 307\]

Therefore, 1, 3, 307, and 921 are the factors of 921.

Total Number of Factors of 921

For 921, there are four positive factors and four negative ones. So in total, there are 8 factors of 921. 

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 921 is given as:

Factorization of 921 is 1 x 3 x 307.

The exponent of 1, 3, and 307 is 1.

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

Therefore, the total number of factors of 921 is 8. Four are positive, and four 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 921 by Prime FactorizationFactor of 921 by Prime Factorization

The number 921 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.

Before finding the factors of 921 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 921, 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 921 can be expressed as:

921 = 3 x 307

Factors of 921 in PairsFactor of 921 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.

For 921, the factor pairs can be found as:

1 x 921 = 921

3 x 307 = 921 

The possible factor pairs of 921 are given as (1, 921) and (3, 307).

All these numbers in pairs, when multiplied, give 921 as the product.

The negative factor pairs of 921 are given as:

-1 x -921 = 921 

-3 x -307 = 921

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, -3, -307, and -921 are called negative factors of 921.

The list of all the factors of 921, including positive as well as negative numbers, is given below.

Factor list of 921: 1, -1, 3, -3, 307, -307, 921, and -921

Factors of 921 Solved Examples

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

Example 1

How many factors of 921 are there?


The total number of Factors of 921 is 8.

Factors of 921 are 1, 3, 307, and 921.

Example 2

Find the factors of 921 using prime factorization.


The prime factorization of 921 is given as:

921 $\div$ 3 = 307 

307 $\div$ 307 = 1 

So the prime factorization of 921 can be written as:

3 x 307 = 921

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