Q: What are the prime factors of the number 38,115,072?

 A: 2, 3, 71, 233

Why are those the prime factors of the number 38,115,072?

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 38,115,072

38,115,072
Factor Arrows
219,057,536
Factor Arrows
29,528,768
Factor Arrows
24,764,384
Factor Arrows
22,382,192
Factor Arrows
21,191,096
Factor Arrows
2595,548
Factor Arrows
2297,774
Factor Arrows
2148,887
Factor Arrows
349,629
Factor Arrows
316,543
Factor Arrows
71233

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, 71, 233

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 3 x 3 x 71 x 233 = 38,115,072

This can also be written as 28 x 32 x 711 x 2331 = 38,115,072

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


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