Q: What are the prime factors of the number 15,766,528?

 A: 2, 89, 173

Why are those the prime factors of the number 15,766,528?

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 15,766,528

15,766,528
Factor Arrows
27,883,264
Factor Arrows
23,941,632
Factor Arrows
21,970,816
Factor Arrows
2985,408
Factor Arrows
2492,704
Factor Arrows
2246,352
Factor Arrows
2123,176
Factor Arrows
261,588
Factor Arrows
230,794
Factor Arrows
215,397
Factor Arrows
89173

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, 89, 173

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 2 x 2 x 89 x 173 = 15,766,528

This can also be written as 210 x 891 x 1731 = 15,766,528

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


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