Q: What are the prime factors of the number 505,600?

 A: 2, 5, 79

Why are those the prime factors of the number 505,600?

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 505,600

505,600
Factor Arrows
2252,800
Factor Arrows
2126,400
Factor Arrows
263,200
Factor Arrows
231,600
Factor Arrows
215,800
Factor Arrows
27,900
Factor Arrows
23,950
Factor Arrows
21,975
Factor Arrows
5395
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, 5, 79

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 2 x 2 x 5 x 5 x 79 = 505,600

This can also be written as 28 x 52 x 791 = 505,600

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


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