Q: What are the prime factors of the number 107,811?

 A: 3, 11

Why are those the prime factors of the number 107,811?

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 107,811

107,811
Factor Arrows
335,937
Factor Arrows
311,979
Factor Arrows
33,993
Factor Arrows
31,331
Factor Arrows
11121
Factor Arrows
1111

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, 11

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 11 x 11 x 11 = 107,811

This can also be written as 34 x 113 = 107,811

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


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