Q: What are the prime factors of the number 120,164,616?

 A: 2, 3, 11, 13, 1061

Why are those the prime factors of the number 120,164,616?

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 120,164,616

120,164,616
Factor Arrows
260,082,308
Factor Arrows
230,041,154
Factor Arrows
215,020,577
Factor Arrows
35,006,859
Factor Arrows
31,668,953
Factor Arrows
11151,723
Factor Arrows
1113,793
Factor Arrows
131,061

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, 11, 13, 1061

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 11 x 11 x 13 x 1,061 = 120,164,616

This can also be written as 23 x 32 x 112 x 131 x 1,0611 = 120,164,616

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


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