Q: What are the prime factors of the number 686,028?

 A: 2, 3, 7, 8167

Why are those the prime factors of the number 686,028?

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 686,028

686,028
Factor Arrows
2343,014
Factor Arrows
2171,507
Factor Arrows
357,169
Factor Arrows
78,167

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, 7, 8167

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 7 x 8,167 = 686,028

This can also be written as 22 x 31 x 71 x 8,1671 = 686,028

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


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