Q: What are the prime factors of the number 12,131,120?

 A: 2, 5, 19, 23, 347

Why are those the prime factors of the number 12,131,120?

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 12,131,120

12,131,120
Factor Arrows
26,065,560
Factor Arrows
23,032,780
Factor Arrows
21,516,390
Factor Arrows
2758,195
Factor Arrows
5151,639
Factor Arrows
197,981
Factor Arrows
23347

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, 19, 23, 347

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 19 x 23 x 347 = 12,131,120

This can also be written as 24 x 51 x 191 x 231 x 3471 = 12,131,120

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


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