Q: What are the prime factors of the number 27,070,720?

 A: 2, 5, 21149

Why are those the prime factors of the number 27,070,720?

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 27,070,720

27,070,720
Factor Arrows
213,535,360
Factor Arrows
26,767,680
Factor Arrows
23,383,840
Factor Arrows
21,691,920
Factor Arrows
2845,960
Factor Arrows
2422,980
Factor Arrows
2211,490
Factor Arrows
2105,745
Factor Arrows
521,149

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, 21149

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 2 x 2 x 5 x 21,149 = 27,070,720

This can also be written as 28 x 51 x 21,1491 = 27,070,720

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


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