Q: What are the prime factors of the number 207,328?

 A: 2, 11, 19, 31

Why are those the prime factors of the number 207,328?

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 207,328

207,328
Factor Arrows
2103,664
Factor Arrows
251,832
Factor Arrows
225,916
Factor Arrows
212,958
Factor Arrows
26,479
Factor Arrows
11589
Factor Arrows
1931

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, 11, 19, 31

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 11 x 19 x 31 = 207,328

This can also be written as 25 x 111 x 191 x 311 = 207,328

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


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