Q: What are the prime factors of the number 120,068,608?

 A: 2, 11, 21319

Why are those the prime factors of the number 120,068,608?

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 120,068,608

120,068,608
Factor Arrows
260,034,304
Factor Arrows
230,017,152
Factor Arrows
215,008,576
Factor Arrows
27,504,288
Factor Arrows
23,752,144
Factor Arrows
21,876,072
Factor Arrows
2938,036
Factor Arrows
2469,018
Factor Arrows
2234,509
Factor Arrows
1121,319

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, 11, 21319

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 2 x 11 x 21,319 = 120,068,608

This can also be written as 29 x 111 x 21,3191 = 120,068,608

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


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