Q: What are the prime factors of the number 384,160?

 A: 2, 5, 7

Why are those the prime factors of the number 384,160?

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 384,160

384,160
Factor Arrows
2192,080
Factor Arrows
296,040
Factor Arrows
248,020
Factor Arrows
224,010
Factor Arrows
212,005
Factor Arrows
52,401
Factor Arrows
7343
Factor Arrows
749
Factor Arrows
77

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, 5, 7

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 7 x 7 x 7 x 7 = 384,160

This can also be written as 25 x 51 x 74 = 384,160

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


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