Q: What are the prime factors of the number 15,505,664?

 A: 2, 37, 1637

Why are those the prime factors of the number 15,505,664?

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 15,505,664

15,505,664
Factor Arrows
27,752,832
Factor Arrows
23,876,416
Factor Arrows
21,938,208
Factor Arrows
2969,104
Factor Arrows
2484,552
Factor Arrows
2242,276
Factor Arrows
2121,138
Factor Arrows
260,569
Factor Arrows
371,637

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, 37, 1637

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 2 x 37 x 1,637 = 15,505,664

This can also be written as 28 x 371 x 1,6371 = 15,505,664

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


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