Q: What are the prime factors of the number 108,918?

 A: 2, 3, 2017

Why are those the prime factors of the number 108,918?

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 108,918

108,918
Factor Arrows
254,459
Factor Arrows
318,153
Factor Arrows
36,051
Factor Arrows
32,017

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, 2017

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 2,017 = 108,918

This can also be written as 21 x 33 x 2,0171 = 108,918

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


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