Q: What are the prime factors of the number 15,311,312?

 A: 2, 73, 13109

Why are those the prime factors of the number 15,311,312?

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 15,311,312

15,311,312
Factor Arrows
27,655,656
Factor Arrows
23,827,828
Factor Arrows
21,913,914
Factor Arrows
2956,957
Factor Arrows
7313,109

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, 73, 13109

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 73 x 13,109 = 15,311,312

This can also be written as 24 x 731 x 13,1091 = 15,311,312

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


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