Q: What are the prime factors of the number 161,670?

 A: 2, 3, 5, 17, 317

Why are those the prime factors of the number 161,670?

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 161,670

161,670
Factor Arrows
280,835
Factor Arrows
326,945
Factor Arrows
55,389
Factor Arrows
17317

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, 17, 317

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 17 x 317 = 161,670

This can also be written as 21 x 31 x 51 x 171 x 3171 = 161,670

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


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