Q: What are the prime factors of the number 15,386,085?

 A: 3, 5, 11, 13, 797

Why are those the prime factors of the number 15,386,085?

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 15,386,085

15,386,085
Factor Arrows
35,128,695
Factor Arrows
31,709,565
Factor Arrows
3569,855
Factor Arrows
5113,971
Factor Arrows
1110,361
Factor Arrows
13797

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:

3, 5, 11, 13, 797

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 5 x 11 x 13 x 797 = 15,386,085

This can also be written as 33 x 51 x 111 x 131 x 7971 = 15,386,085

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


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