Q: What are the prime factors of the number 251,213,316?

 A: 2, 3, 97, 107, 2017

Why are those the prime factors of the number 251,213,316?

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 251,213,316

251,213,316
Factor Arrows
2125,606,658
Factor Arrows
262,803,329
Factor Arrows
320,934,443
Factor Arrows
97215,819
Factor Arrows
1072,017

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, 97, 107, 2017

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 97 x 107 x 2,017 = 251,213,316

This can also be written as 22 x 31 x 971 x 1071 x 2,0171 = 251,213,316

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


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