Q: What are the prime factors of the number 315,488?

 A: 2, 9859

Why are those the prime factors of the number 315,488?

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 315,488

315,488
Factor Arrows
2157,744
Factor Arrows
278,872
Factor Arrows
239,436
Factor Arrows
219,718
Factor Arrows
29,859

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, 9859

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 9,859 = 315,488

This can also be written as 25 x 9,8591 = 315,488

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


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