Q: What are the prime factors of the number 831,168?

 A: 2, 3, 13, 37

Why are those the prime factors of the number 831,168?

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 831,168

831,168
Factor Arrows
2415,584
Factor Arrows
2207,792
Factor Arrows
2103,896
Factor Arrows
251,948
Factor Arrows
225,974
Factor Arrows
212,987
Factor Arrows
34,329
Factor Arrows
31,443
Factor Arrows
3481
Factor Arrows
1337

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, 13, 37

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 13 x 37 = 831,168

This can also be written as 26 x 33 x 131 x 371 = 831,168

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


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