Q: What are the prime factors of the number 70,115,072?

 A: 2, 17, 16111

Why are those the prime factors of the number 70,115,072?

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 70,115,072

70,115,072
Factor Arrows
235,057,536
Factor Arrows
217,528,768
Factor Arrows
28,764,384
Factor Arrows
24,382,192
Factor Arrows
22,191,096
Factor Arrows
21,095,548
Factor Arrows
2547,774
Factor Arrows
2273,887
Factor Arrows
1716,111

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, 17, 16111

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 17 x 16,111 = 70,115,072

This can also be written as 28 x 171 x 16,1111 = 70,115,072

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


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