Q: What are the prime factors of the number 99,520?

 A: 2, 5, 311

Why are those the prime factors of the number 99,520?

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 99,520

99,520
Factor Arrows
249,760
Factor Arrows
224,880
Factor Arrows
212,440
Factor Arrows
26,220
Factor Arrows
23,110
Factor Arrows
21,555
Factor Arrows
5311

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, 311

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 311 = 99,520

This can also be written as 26 x 51 x 3111 = 99,520

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


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