Q: What are the prime factors of the number 70,065?

 A: 3, 5, 173

Why are those the prime factors of the number 70,065?

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 70,065

70,065
Factor Arrows
323,355
Factor Arrows
37,785
Factor Arrows
32,595
Factor Arrows
3865
Factor Arrows
5173

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:

3, 5, 173

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 5 x 173 = 70,065

This can also be written as 34 x 51 x 1731 = 70,065

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


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