Q: What are the prime factors of the number 717,812,864?

 A: 2, 61, 149, 617

Why are those the prime factors of the number 717,812,864?

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 717,812,864

717,812,864
Factor Arrows
2358,906,432
Factor Arrows
2179,453,216
Factor Arrows
289,726,608
Factor Arrows
244,863,304
Factor Arrows
222,431,652
Factor Arrows
211,215,826
Factor Arrows
25,607,913
Factor Arrows
6191,933
Factor Arrows
149617

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, 61, 149, 617

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 61 x 149 x 617 = 717,812,864

This can also be written as 27 x 611 x 1491 x 6171 = 717,812,864

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


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