Q: What are the prime factors of the number 120,416,730?

 A: 2, 3, 5, 7, 23, 107, 233

Why are those the prime factors of the number 120,416,730?

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 120,416,730

120,416,730
Factor Arrows
260,208,365
Factor Arrows
320,069,455
Factor Arrows
54,013,891
Factor Arrows
7573,413
Factor Arrows
2324,931
Factor Arrows
107233

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, 5, 7, 23, 107, 233

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 7 x 23 x 107 x 233 = 120,416,730

This can also be written as 21 x 31 x 51 x 71 x 231 x 1071 x 2331 = 120,416,730

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


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