Q: What are the prime factors of the number 384,384?

 A: 2, 3, 7, 11, 13

Why are those the prime factors of the number 384,384?

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 384,384

384,384
Factor Arrows
2192,192
Factor Arrows
296,096
Factor Arrows
248,048
Factor Arrows
224,024
Factor Arrows
212,012
Factor Arrows
26,006
Factor Arrows
23,003
Factor Arrows
31,001
Factor Arrows
7143
Factor Arrows
1113

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, 7, 11, 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 3 x 7 x 11 x 13 = 384,384

This can also be written as 27 x 31 x 71 x 111 x 131 = 384,384

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


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