Q: What are the prime factors of the number 15,931,776?

 A: 2, 3, 7, 5927

Why are those the prime factors of the number 15,931,776?

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 15,931,776

15,931,776
Factor Arrows
27,965,888
Factor Arrows
23,982,944
Factor Arrows
21,991,472
Factor Arrows
2995,736
Factor Arrows
2497,868
Factor Arrows
2248,934
Factor Arrows
2124,467
Factor Arrows
341,489
Factor Arrows
75,927

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, 5927

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 7 x 5,927 = 15,931,776

This can also be written as 27 x 31 x 71 x 5,9271 = 15,931,776

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


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