Q: What are the prime factors of the number 206,910?

 A: 2, 3, 5, 11, 19

Why are those the prime factors of the number 206,910?

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 206,910

206,910
Factor Arrows
2103,455
Factor Arrows
334,485
Factor Arrows
311,495
Factor Arrows
52,299
Factor Arrows
11209
Factor Arrows
1119

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, 11, 19

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 5 x 11 x 11 x 19 = 206,910

This can also be written as 21 x 32 x 51 x 112 x 191 = 206,910

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


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