Q: What are the prime factors of the number 647,744?

 A: 2, 29, 349

Why are those the prime factors of the number 647,744?

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 647,744

647,744
Factor Arrows
2323,872
Factor Arrows
2161,936
Factor Arrows
280,968
Factor Arrows
240,484
Factor Arrows
220,242
Factor Arrows
210,121
Factor Arrows
29349

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, 29, 349

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 29 x 349 = 647,744

This can also be written as 26 x 291 x 3491 = 647,744

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


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