Q: What are the prime factors of the number 717,120?

 A: 2, 3, 5, 83

Why are those the prime factors of the number 717,120?

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 717,120

717,120
Factor Arrows
2358,560
Factor Arrows
2179,280
Factor Arrows
289,640
Factor Arrows
244,820
Factor Arrows
222,410
Factor Arrows
211,205
Factor Arrows
33,735
Factor Arrows
31,245
Factor Arrows
3415
Factor Arrows
583

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, 5, 83

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 3 x 3 x 3 x 5 x 83 = 717,120

This can also be written as 26 x 33 x 51 x 831 = 717,120

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


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