Q: What are the prime factors of the number 15,647,360?

 A: 2, 5, 23, 1063

Why are those the prime factors of the number 15,647,360?

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 15,647,360

15,647,360
Factor Arrows
27,823,680
Factor Arrows
23,911,840
Factor Arrows
21,955,920
Factor Arrows
2977,960
Factor Arrows
2488,980
Factor Arrows
2244,490
Factor Arrows
2122,245
Factor Arrows
524,449
Factor Arrows
231,063

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, 1063

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 5 x 23 x 1,063 = 15,647,360

This can also be written as 27 x 51 x 231 x 1,0631 = 15,647,360

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


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