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

 A: 2, 3, 5, 17

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

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 832,320

832,320
Factor Arrows
2416,160
Factor Arrows
2208,080
Factor Arrows
2104,040
Factor Arrows
252,020
Factor Arrows
226,010
Factor Arrows
213,005
Factor Arrows
34,335
Factor Arrows
31,445
Factor Arrows
5289
Factor Arrows
1717

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, 5, 17

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 5 x 17 x 17 = 832,320

This can also be written as 26 x 32 x 51 x 172 = 832,320

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


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