Q: What are the prime factors of the number 523,120?

 A: 2, 5, 13, 503

Why are those the prime factors of the number 523,120?

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 523,120

523,120
Factor Arrows
2261,560
Factor Arrows
2130,780
Factor Arrows
265,390
Factor Arrows
232,695
Factor Arrows
56,539
Factor Arrows
13503

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, 13, 503

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 13 x 503 = 523,120

This can also be written as 24 x 51 x 131 x 5031 = 523,120

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


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