Q: What are the prime factors of the number 647,733,320?

 A: 2, 5, 13, 17, 47, 1559

Why are those the prime factors of the number 647,733,320?

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 647,733,320

647,733,320
Factor Arrows
2323,866,660
Factor Arrows
2161,933,330
Factor Arrows
280,966,665
Factor Arrows
516,193,333
Factor Arrows
131,245,641
Factor Arrows
1773,273
Factor Arrows
471,559

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, 13, 17, 47, 1559

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 5 x 13 x 17 x 47 x 1,559 = 647,733,320

This can also be written as 23 x 51 x 131 x 171 x 471 x 1,5591 = 647,733,320

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


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