Q: What are the prime factors of the number 396,875?

 A: 5, 127

Why are those the prime factors of the number 396,875?

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 396,875

396,875
Factor Arrows
579,375
Factor Arrows
515,875
Factor Arrows
53,175
Factor Arrows
5635
Factor Arrows
5127

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:

5, 127

We can check our work by multiplying all of the prime factors together: 5 x 5 x 5 x 5 x 5 x 127 = 396,875

This can also be written as 55 x 1271 = 396,875

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


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