Q: What are the prime factors of the number 181,272?

 A: 2, 3, 7, 13, 83

Why are those the prime factors of the number 181,272?

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 181,272

181,272
Factor Arrows
290,636
Factor Arrows
245,318
Factor Arrows
222,659
Factor Arrows
37,553
Factor Arrows
71,079
Factor Arrows
1383

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, 7, 13, 83

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 7 x 13 x 83 = 181,272

This can also be written as 23 x 31 x 71 x 131 x 831 = 181,272

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


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