Q: What are the prime factors of the number 310,158,640?

 A: 2, 5, 11, 47, 7499

Why are those the prime factors of the number 310,158,640?

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 310,158,640

310,158,640
Factor Arrows
2155,079,320
Factor Arrows
277,539,660
Factor Arrows
238,769,830
Factor Arrows
219,384,915
Factor Arrows
53,876,983
Factor Arrows
11352,453
Factor Arrows
477,499

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, 5, 11, 47, 7499

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 11 x 47 x 7,499 = 310,158,640

This can also be written as 24 x 51 x 111 x 471 x 7,4991 = 310,158,640

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


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