Q: What are the prime factors of the number 12,380,640?

 A: 2, 3, 5, 25793

Why are those the prime factors of the number 12,380,640?

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 12,380,640

12,380,640
Factor Arrows
26,190,320
Factor Arrows
23,095,160
Factor Arrows
21,547,580
Factor Arrows
2773,790
Factor Arrows
2386,895
Factor Arrows
3128,965
Factor Arrows
525,793

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, 25793

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 5 x 25,793 = 12,380,640

This can also be written as 25 x 31 x 51 x 25,7931 = 12,380,640

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


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