Q: What are the prime factors of the number 120,221,024?

 A: 2, 7, 11, 97, 503

Why are those the prime factors of the number 120,221,024?

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 120,221,024

120,221,024
Factor Arrows
260,110,512
Factor Arrows
230,055,256
Factor Arrows
215,027,628
Factor Arrows
27,513,814
Factor Arrows
23,756,907
Factor Arrows
7536,701
Factor Arrows
1148,791
Factor Arrows
97503

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, 7, 11, 97, 503

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 7 x 11 x 97 x 503 = 120,221,024

This can also be written as 25 x 71 x 111 x 971 x 5031 = 120,221,024

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


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