Q: What are the prime factors of the number 85,975?

 A: 5, 19, 181

Why are those the prime factors of the number 85,975?

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 85,975

85,975
Factor Arrows
517,195
Factor Arrows
53,439
Factor Arrows
19181

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:

5, 19, 181

We can check our work by multiplying all of the prime factors together: 5 x 5 x 19 x 181 = 85,975

This can also be written as 52 x 191 x 1811 = 85,975

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


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