Q: What are the prime factors of the number 310,681,440?

 A: 2, 3, 5, 71917

Why are those the prime factors of the number 310,681,440?

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 310,681,440

310,681,440
Factor Arrows
2155,340,720
Factor Arrows
277,670,360
Factor Arrows
238,835,180
Factor Arrows
219,417,590
Factor Arrows
29,708,795
Factor Arrows
33,236,265
Factor Arrows
31,078,755
Factor Arrows
3359,585
Factor Arrows
571,917

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, 71917

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 5 x 71,917 = 310,681,440

This can also be written as 25 x 33 x 51 x 71,9171 = 310,681,440

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


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