Q: What are the prime factors of the number 15,503,968?

 A: 2, 31, 15629

Why are those the prime factors of the number 15,503,968?

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 15,503,968

15,503,968
Factor Arrows
27,751,984
Factor Arrows
23,875,992
Factor Arrows
21,937,996
Factor Arrows
2968,998
Factor Arrows
2484,499
Factor Arrows
3115,629

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, 31, 15629

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 31 x 15,629 = 15,503,968

This can also be written as 25 x 311 x 15,6291 = 15,503,968

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


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