Q: What are the prime factors of the number 113,121,330?

 A: 2, 3, 5, 7, 313, 1721

Why are those the prime factors of the number 113,121,330?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 113,121,330

113,121,330
Factor Arrows
256,560,665
Factor Arrows
318,853,555
Factor Arrows
53,770,711
Factor Arrows
7538,673
Factor Arrows
3131,721

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

2, 3, 5, 7, 313, 1721

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 7 x 313 x 1,721 = 113,121,330

This can also be written as 21 x 31 x 51 x 71 x 3131 x 1,7211 = 113,121,330

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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