Q: What are the prime factors of the number 15,729,568?

 A: 2, 19, 41, 631

Why are those the prime factors of the number 15,729,568?

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 15,729,568

15,729,568
Factor Arrows
27,864,784
Factor Arrows
23,932,392
Factor Arrows
21,966,196
Factor Arrows
2983,098
Factor Arrows
2491,549
Factor Arrows
1925,871
Factor Arrows
41631

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, 19, 41, 631

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 19 x 41 x 631 = 15,729,568

This can also be written as 25 x 191 x 411 x 6311 = 15,729,568

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


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