Q: What are the prime factors of the number 392,976?

 A: 2, 3, 2729

Why are those the prime factors of the number 392,976?

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 392,976

392,976
Factor Arrows
2196,488
Factor Arrows
298,244
Factor Arrows
249,122
Factor Arrows
224,561
Factor Arrows
38,187
Factor Arrows
32,729

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, 2729

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 2,729 = 392,976

This can also be written as 24 x 32 x 2,7291 = 392,976

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


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