Q: What are the prime factors of the number 847,875?

 A: 3, 5, 7, 17, 19

Why are those the prime factors of the number 847,875?

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 847,875

847,875
Factor Arrows
3282,625
Factor Arrows
556,525
Factor Arrows
511,305
Factor Arrows
52,261
Factor Arrows
7323
Factor Arrows
1719

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, 7, 17, 19

We can check our work by multiplying all of the prime factors together: 3 x 5 x 5 x 5 x 7 x 17 x 19 = 847,875

This can also be written as 31 x 53 x 71 x 171 x 191 = 847,875

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


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