Q: What are the prime factors of the number 320,832?

 A: 2, 3, 557

Why are those the prime factors of the number 320,832?

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 320,832

320,832
Factor Arrows
2160,416
Factor Arrows
280,208
Factor Arrows
240,104
Factor Arrows
220,052
Factor Arrows
210,026
Factor Arrows
25,013
Factor Arrows
31,671
Factor Arrows
3557

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, 3, 557

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 3 x 3 x 557 = 320,832

This can also be written as 26 x 32 x 5571 = 320,832

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


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