Q: What are the prime factors of the number 72,131,634?

 A: 2, 3, 23, 239

Why are those the prime factors of the number 72,131,634?

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 72,131,634

72,131,634
Factor Arrows
236,065,817
Factor Arrows
312,021,939
Factor Arrows
34,007,313
Factor Arrows
31,335,771
Factor Arrows
3445,257
Factor Arrows
3148,419
Factor Arrows
349,473
Factor Arrows
316,491
Factor Arrows
35,497
Factor Arrows
23239

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, 23, 239

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 23 x 239 = 72,131,634

This can also be written as 21 x 38 x 231 x 2391 = 72,131,634

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


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