Q: What are the prime factors of the number 480,320?

 A: 2, 5, 19, 79

Why are those the prime factors of the number 480,320?

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 480,320

480,320
Factor Arrows
2240,160
Factor Arrows
2120,080
Factor Arrows
260,040
Factor Arrows
230,020
Factor Arrows
215,010
Factor Arrows
27,505
Factor Arrows
51,501
Factor Arrows
1979

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, 19, 79

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 19 x 79 = 480,320

This can also be written as 26 x 51 x 191 x 791 = 480,320

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


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