Q: What are the prime factors of the number 13,288,640?

 A: 2, 5, 131, 317

Why are those the prime factors of the number 13,288,640?

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 13,288,640

13,288,640
Factor Arrows
26,644,320
Factor Arrows
23,322,160
Factor Arrows
21,661,080
Factor Arrows
2830,540
Factor Arrows
2415,270
Factor Arrows
2207,635
Factor Arrows
541,527
Factor Arrows
131317

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, 131, 317

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 5 x 131 x 317 = 13,288,640

This can also be written as 26 x 51 x 1311 x 3171 = 13,288,640

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


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