Q: What are the prime factors of the number 647,660,104?

 A: 2, 7, 13, 389, 2287

Why are those the prime factors of the number 647,660,104?

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 647,660,104

647,660,104
Factor Arrows
2323,830,052
Factor Arrows
2161,915,026
Factor Arrows
280,957,513
Factor Arrows
711,565,359
Factor Arrows
13889,643
Factor Arrows
3892,287

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, 7, 13, 389, 2287

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 7 x 13 x 389 x 2,287 = 647,660,104

This can also be written as 23 x 71 x 131 x 3891 x 2,2871 = 647,660,104

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


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