Q: What are the prime factors of the number 15,305,664?

 A: 2, 3, 11, 7247

Why are those the prime factors of the number 15,305,664?

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 15,305,664

15,305,664
Factor Arrows
27,652,832
Factor Arrows
23,826,416
Factor Arrows
21,913,208
Factor Arrows
2956,604
Factor Arrows
2478,302
Factor Arrows
2239,151
Factor Arrows
379,717
Factor Arrows
117,247

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, 11, 7247

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 3 x 11 x 7,247 = 15,305,664

This can also be written as 26 x 31 x 111 x 7,2471 = 15,305,664

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


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