Q: What are the prime factors of the number 125,984?

 A: 2, 31, 127

Why are those the prime factors of the number 125,984?

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 125,984

125,984
Factor Arrows
262,992
Factor Arrows
231,496
Factor Arrows
215,748
Factor Arrows
27,874
Factor Arrows
23,937
Factor Arrows
31127

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, 31, 127

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 31 x 127 = 125,984

This can also be written as 25 x 311 x 1271 = 125,984

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


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