Q: What are the prime factors of the number 181,280?

 A: 2, 5, 11, 103

Why are those the prime factors of the number 181,280?

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 181,280

181,280
Factor Arrows
290,640
Factor Arrows
245,320
Factor Arrows
222,660
Factor Arrows
211,330
Factor Arrows
25,665
Factor Arrows
51,133
Factor Arrows
11103

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, 11, 103

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 11 x 103 = 181,280

This can also be written as 25 x 51 x 111 x 1031 = 181,280

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


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