Q: What are the prime factors of the number 15,717,280?

 A: 2, 5, 23, 4271

Why are those the prime factors of the number 15,717,280?

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 15,717,280

15,717,280
Factor Arrows
27,858,640
Factor Arrows
23,929,320
Factor Arrows
21,964,660
Factor Arrows
2982,330
Factor Arrows
2491,165
Factor Arrows
598,233
Factor Arrows
234,271

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, 23, 4271

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 23 x 4,271 = 15,717,280

This can also be written as 25 x 51 x 231 x 4,2711 = 15,717,280

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


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