Q: What are the prime factors of the number 185,136?

 A: 2, 3, 7, 19, 29

Why are those the prime factors of the number 185,136?

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 185,136

185,136
Factor Arrows
292,568
Factor Arrows
246,284
Factor Arrows
223,142
Factor Arrows
211,571
Factor Arrows
33,857
Factor Arrows
7551
Factor Arrows
1929

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, 19, 29

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 7 x 19 x 29 = 185,136

This can also be written as 24 x 31 x 71 x 191 x 291 = 185,136

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


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