Q: What are the prime factors of the number 351,168?

 A: 2, 3, 31, 59

Why are those the prime factors of the number 351,168?

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 351,168

351,168
Factor Arrows
2175,584
Factor Arrows
287,792
Factor Arrows
243,896
Factor Arrows
221,948
Factor Arrows
210,974
Factor Arrows
25,487
Factor Arrows
31,829
Factor Arrows
3159

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, 31, 59

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 31 x 59 = 351,168

This can also be written as 26 x 31 x 311 x 591 = 351,168

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


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