Q: What are the prime factors of the number 485,920?

 A: 2, 5, 3037

Why are those the prime factors of the number 485,920?

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 485,920

485,920
Factor Arrows
2242,960
Factor Arrows
2121,480
Factor Arrows
260,740
Factor Arrows
230,370
Factor Arrows
215,185
Factor Arrows
53,037

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, 3037

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 3,037 = 485,920

This can also be written as 25 x 51 x 3,0371 = 485,920

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


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