Q: What are the prime factors of the number 315,008?

 A: 2, 23, 107

Why are those the prime factors of the number 315,008?

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 315,008

315,008
Factor Arrows
2157,504
Factor Arrows
278,752
Factor Arrows
239,376
Factor Arrows
219,688
Factor Arrows
29,844
Factor Arrows
24,922
Factor Arrows
22,461
Factor Arrows
23107

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, 23, 107

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 23 x 107 = 315,008

This can also be written as 27 x 231 x 1071 = 315,008

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


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