Q: What are the prime factors of the number 15,507,744?

 A: 2, 3, 7, 47, 491

Why are those the prime factors of the number 15,507,744?

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 15,507,744

15,507,744
Factor Arrows
27,753,872
Factor Arrows
23,876,936
Factor Arrows
21,938,468
Factor Arrows
2969,234
Factor Arrows
2484,617
Factor Arrows
3161,539
Factor Arrows
723,077
Factor Arrows
47491

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, 47, 491

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 7 x 47 x 491 = 15,507,744

This can also be written as 25 x 31 x 71 x 471 x 4911 = 15,507,744

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


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