Q: What are the prime factors of the number 213,090?

 A: 2, 3, 5, 7103

Why are those the prime factors of the number 213,090?

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 213,090

213,090
Factor Arrows
2106,545
Factor Arrows
335,515
Factor Arrows
57,103

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, 7103

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 7,103 = 213,090

This can also be written as 21 x 31 x 51 x 7,1031 = 213,090

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


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