Q: What are the prime factors of the number 12,815,160?

 A: 2, 3, 5, 269, 397

Why are those the prime factors of the number 12,815,160?

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 12,815,160

12,815,160
Factor Arrows
26,407,580
Factor Arrows
23,203,790
Factor Arrows
21,601,895
Factor Arrows
3533,965
Factor Arrows
5106,793
Factor Arrows
269397

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, 269, 397

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 269 x 397 = 12,815,160

This can also be written as 23 x 31 x 51 x 2691 x 3971 = 12,815,160

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


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