Q: What are the prime factors of the number 113,520?

 A: 2, 3, 5, 11, 43

Why are those the prime factors of the number 113,520?

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 113,520

113,520
Factor Arrows
256,760
Factor Arrows
228,380
Factor Arrows
214,190
Factor Arrows
27,095
Factor Arrows
32,365
Factor Arrows
5473
Factor Arrows
1143

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, 3, 5, 11, 43

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 11 x 43 = 113,520

This can also be written as 24 x 31 x 51 x 111 x 431 = 113,520

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


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