Q: What are the prime factors of the number 15,637,986?

 A: 2, 3, 7, 13, 9547

Why are those the prime factors of the number 15,637,986?

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 15,637,986

15,637,986
Factor Arrows
27,818,993
Factor Arrows
32,606,331
Factor Arrows
3868,777
Factor Arrows
7124,111
Factor Arrows
139,547

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, 7, 13, 9547

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 7 x 13 x 9,547 = 15,637,986

This can also be written as 21 x 32 x 71 x 131 x 9,5471 = 15,637,986

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


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