Q: What are the prime factors of the number 322,880?

 A: 2, 5, 1009

Why are those the prime factors of the number 322,880?

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 322,880

322,880
Factor Arrows
2161,440
Factor Arrows
280,720
Factor Arrows
240,360
Factor Arrows
220,180
Factor Arrows
210,090
Factor Arrows
25,045
Factor Arrows
51,009

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, 1009

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 5 x 1,009 = 322,880

This can also be written as 26 x 51 x 1,0091 = 322,880

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


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