Q: What are the prime factors of the number 15,059,072?

 A: 2, 7

Why are those the prime factors of the number 15,059,072?

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 15,059,072

15,059,072
Factor Arrows
27,529,536
Factor Arrows
23,764,768
Factor Arrows
21,882,384
Factor Arrows
2941,192
Factor Arrows
2470,596
Factor Arrows
2235,298
Factor Arrows
2117,649
Factor Arrows
716,807
Factor Arrows
72,401
Factor Arrows
7343
Factor Arrows
749
Factor Arrows
77

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, 7

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 7 x 7 x 7 x 7 x 7 x 7 = 15,059,072

This can also be written as 27 x 76 = 15,059,072

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


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