Q: What are the prime factors of the number 208,530?

 A: 2, 3, 5, 7, 331

Why are those the prime factors of the number 208,530?

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 208,530

208,530
Factor Arrows
2104,265
Factor Arrows
334,755
Factor Arrows
311,585
Factor Arrows
52,317
Factor Arrows
7331

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, 7, 331

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 5 x 7 x 331 = 208,530

This can also be written as 21 x 32 x 51 x 71 x 3311 = 208,530

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


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