Q: What are the prime factors of the number 315,103,392?

 A: 2, 3, 251, 1453

Why are those the prime factors of the number 315,103,392?

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 315,103,392

315,103,392
Factor Arrows
2157,551,696
Factor Arrows
278,775,848
Factor Arrows
239,387,924
Factor Arrows
219,693,962
Factor Arrows
29,846,981
Factor Arrows
33,282,327
Factor Arrows
31,094,109
Factor Arrows
3364,703
Factor Arrows
2511,453

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, 251, 1453

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 251 x 1,453 = 315,103,392

This can also be written as 25 x 33 x 2511 x 1,4531 = 315,103,392

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


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