Q: What are the prime factors of the number 220,590?

 A: 2, 3, 5, 19, 43

Why are those the prime factors of the number 220,590?

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 220,590

220,590
Factor Arrows
2110,295
Factor Arrows
336,765
Factor Arrows
312,255
Factor Arrows
34,085
Factor Arrows
5817
Factor Arrows
1943

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, 19, 43

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 5 x 19 x 43 = 220,590

This can also be written as 21 x 33 x 51 x 191 x 431 = 220,590

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


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