Q: What are the prime factors of the number 509,120?

 A: 2, 5, 37, 43

Why are those the prime factors of the number 509,120?

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 509,120

509,120
Factor Arrows
2254,560
Factor Arrows
2127,280
Factor Arrows
263,640
Factor Arrows
231,820
Factor Arrows
215,910
Factor Arrows
27,955
Factor Arrows
51,591
Factor Arrows
3743

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, 37, 43

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 37 x 43 = 509,120

This can also be written as 26 x 51 x 371 x 431 = 509,120

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


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