Q: What are the prime factors of the number 18,960?

 A: 2, 3, 5, 79

Why are those the prime factors of the number 18,960?

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 18,960

18,960
Factor Arrows
29,480
Factor Arrows
24,740
Factor Arrows
22,370
Factor Arrows
21,185
Factor Arrows
3395
Factor Arrows
579

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, 79

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 79 = 18,960

This can also be written as 24 x 31 x 51 x 791 = 18,960

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


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