Q: What are the prime factors of the number 172,506,531?

 A: 3, 17, 467, 7243

Why are those the prime factors of the number 172,506,531?

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 172,506,531

172,506,531
Factor Arrows
357,502,177
Factor Arrows
173,382,481
Factor Arrows
4677,243

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:

3, 17, 467, 7243

We can check our work by multiplying all of the prime factors together: 3 x 17 x 467 x 7,243 = 172,506,531

This can also be written as 31 x 171 x 4671 x 7,2431 = 172,506,531

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


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