Q: What are the prime factors of the number 120,321,110?

 A: 2, 5, 7, 13, 19, 6959

Why are those the prime factors of the number 120,321,110?

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 120,321,110

120,321,110
Factor Arrows
260,160,555
Factor Arrows
512,032,111
Factor Arrows
71,718,873
Factor Arrows
13132,221
Factor Arrows
196,959

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, 5, 7, 13, 19, 6959

We can check our work by multiplying all of the prime factors together: 2 x 5 x 7 x 13 x 19 x 6,959 = 120,321,110

This can also be written as 21 x 51 x 71 x 131 x 191 x 6,9591 = 120,321,110

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


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