Q: What are the prime factors of the number 120,131,028?

 A: 2, 3, 139, 24007

Why are those the prime factors of the number 120,131,028?

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 120,131,028

120,131,028
Factor Arrows
260,065,514
Factor Arrows
230,032,757
Factor Arrows
310,010,919
Factor Arrows
33,336,973
Factor Arrows
13924,007

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, 139, 24007

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 139 x 24,007 = 120,131,028

This can also be written as 22 x 32 x 1391 x 24,0071 = 120,131,028

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


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