Q: What are the prime factors of the number 120,102,144?

 A: 2, 3, 17, 9199

Why are those the prime factors of the number 120,102,144?

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 120,102,144

120,102,144
Factor Arrows
260,051,072
Factor Arrows
230,025,536
Factor Arrows
215,012,768
Factor Arrows
27,506,384
Factor Arrows
23,753,192
Factor Arrows
21,876,596
Factor Arrows
2938,298
Factor Arrows
2469,149
Factor Arrows
3156,383
Factor Arrows
179,199

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, 17, 9199

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 2 x 2 x 3 x 17 x 9,199 = 120,102,144

This can also be written as 28 x 31 x 171 x 9,1991 = 120,102,144

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


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