Q: What are the prime factors of the number 378,304?

 A: 2, 23, 257

Why are those the prime factors of the number 378,304?

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 378,304

378,304
Factor Arrows
2189,152
Factor Arrows
294,576
Factor Arrows
247,288
Factor Arrows
223,644
Factor Arrows
211,822
Factor Arrows
25,911
Factor Arrows
23257

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, 23, 257

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 23 x 257 = 378,304

This can also be written as 26 x 231 x 2571 = 378,304

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


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