Q: What are the prime factors of the number 3,328?

 A: 2, 13

Why are those the prime factors of the number 3,328?

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 3,328

3,328
Factor Arrows
21,664
Factor Arrows
2832
Factor Arrows
2416
Factor Arrows
2208
Factor Arrows
2104
Factor Arrows
252
Factor Arrows
226
Factor Arrows
213

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, 13

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 13 = 3,328

This can also be written as 28 x 131 = 3,328

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


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