Q: What are the prime factors of the number 385,056?

 A: 2, 3, 7, 191

Why are those the prime factors of the number 385,056?

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 385,056

385,056
Factor Arrows
2192,528
Factor Arrows
296,264
Factor Arrows
248,132
Factor Arrows
224,066
Factor Arrows
212,033
Factor Arrows
34,011
Factor Arrows
31,337
Factor Arrows
7191

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, 191

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 7 x 191 = 385,056

This can also be written as 25 x 32 x 71 x 1911 = 385,056

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


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