Q: What are the prime factors of the number 979,320?

 A: 2, 3, 5, 8161

Why are those the prime factors of the number 979,320?

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 979,320

979,320
Factor Arrows
2489,660
Factor Arrows
2244,830
Factor Arrows
2122,415
Factor Arrows
340,805
Factor Arrows
58,161

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, 5, 8161

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 8,161 = 979,320

This can also be written as 23 x 31 x 51 x 8,1611 = 979,320

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


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