Q: What are the prime factors of the number 199,272?

 A: 2, 3, 19, 23

Why are those the prime factors of the number 199,272?

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 199,272

199,272
Factor Arrows
299,636
Factor Arrows
249,818
Factor Arrows
224,909
Factor Arrows
38,303
Factor Arrows
19437
Factor Arrows
1923

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, 19, 23

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 19 x 19 x 23 = 199,272

This can also be written as 23 x 31 x 192 x 231 = 199,272

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


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