Q: What are the prime factors of the number 394,768?

 A: 2, 11, 2243

Why are those the prime factors of the number 394,768?

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 394,768

394,768
Factor Arrows
2197,384
Factor Arrows
298,692
Factor Arrows
249,346
Factor Arrows
224,673
Factor Arrows
112,243

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, 11, 2243

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 11 x 2,243 = 394,768

This can also be written as 24 x 111 x 2,2431 = 394,768

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


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