Q: What are the prime factors of the number 135,286?

 A: 2, 17, 23, 173

Why are those the prime factors of the number 135,286?

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 135,286

135,286
Factor Arrows
267,643
Factor Arrows
173,979
Factor Arrows
23173

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, 17, 23, 173

We can check our work by multiplying all of the prime factors together: 2 x 17 x 23 x 173 = 135,286

This can also be written as 21 x 171 x 231 x 1731 = 135,286

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


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