Q: What are the prime factors of the number 120,221,008?

 A: 2, 17, 29, 15241

Why are those the prime factors of the number 120,221,008?

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 120,221,008

120,221,008
Factor Arrows
260,110,504
Factor Arrows
230,055,252
Factor Arrows
215,027,626
Factor Arrows
27,513,813
Factor Arrows
17441,989
Factor Arrows
2915,241

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, 17, 29, 15241

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 17 x 29 x 15,241 = 120,221,008

This can also be written as 24 x 171 x 291 x 15,2411 = 120,221,008

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


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