Q: What are the prime factors of the number 121,020,224?

 A: 2, 13, 67, 167

Why are those the prime factors of the number 121,020,224?

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 121,020,224

121,020,224
Factor Arrows
260,510,112
Factor Arrows
230,255,056
Factor Arrows
215,127,528
Factor Arrows
27,563,764
Factor Arrows
23,781,882
Factor Arrows
21,890,941
Factor Arrows
13145,457
Factor Arrows
1311,189
Factor Arrows
67167

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, 13, 67, 167

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 13 x 13 x 67 x 167 = 121,020,224

This can also be written as 26 x 132 x 671 x 1671 = 121,020,224

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


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