Q: What are the prime factors of the number 504,640?

 A: 2, 5, 19, 83

Why are those the prime factors of the number 504,640?

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 504,640

504,640
Factor Arrows
2252,320
Factor Arrows
2126,160
Factor Arrows
263,080
Factor Arrows
231,540
Factor Arrows
215,770
Factor Arrows
27,885
Factor Arrows
51,577
Factor Arrows
1983

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, 83

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 83 = 504,640

This can also be written as 26 x 51 x 191 x 831 = 504,640

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


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