Q: What are the prime factors of the number 99,328?

 A: 2, 97

Why are those the prime factors of the number 99,328?

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 99,328

99,328
Factor Arrows
249,664
Factor Arrows
224,832
Factor Arrows
212,416
Factor Arrows
26,208
Factor Arrows
23,104
Factor Arrows
21,552
Factor Arrows
2776
Factor Arrows
2388
Factor Arrows
2194
Factor Arrows
297

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, 97

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 2 x 2 x 97 = 99,328

This can also be written as 210 x 971 = 99,328

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


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