Q: What are the prime factors of the number 58,320?

 A: 2, 3, 5

Why are those the prime factors of the number 58,320?

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 58,320

58,320
Factor Arrows
229,160
Factor Arrows
214,580
Factor Arrows
27,290
Factor Arrows
23,645
Factor Arrows
31,215
Factor Arrows
3405
Factor Arrows
3135
Factor Arrows
345
Factor Arrows
315
Factor Arrows
35

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

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 3 x 3 x 5 = 58,320

This can also be written as 24 x 36 x 51 = 58,320

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


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