Q: What are the prime factors of the number 837?

 A: 3, 31

Why are those the prime factors of the number 837?

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 837

837
Factor Arrows
3279
Factor Arrows
393
Factor Arrows
331

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:

3, 31

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 31 = 837

This can also be written as 33 x 311 = 837

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


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