Q: What are the prime factors of the number 386,688?

 A: 2, 3, 19, 53

Why are those the prime factors of the number 386,688?

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 386,688

386,688
Factor Arrows
2193,344
Factor Arrows
296,672
Factor Arrows
248,336
Factor Arrows
224,168
Factor Arrows
212,084
Factor Arrows
26,042
Factor Arrows
23,021
Factor Arrows
31,007
Factor Arrows
1953

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, 53

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 19 x 53 = 386,688

This can also be written as 27 x 31 x 191 x 531 = 386,688

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


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