Q: What are the prime factors of the number 213,075?

 A: 3, 5, 947

Why are those the prime factors of the number 213,075?

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 213,075

213,075
Factor Arrows
371,025
Factor Arrows
323,675
Factor Arrows
54,735
Factor Arrows
5947

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, 947

We can check our work by multiplying all of the prime factors together: 3 x 3 x 5 x 5 x 947 = 213,075

This can also be written as 32 x 52 x 9471 = 213,075

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


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