Q: What are the prime factors of the number 319,680?

 A: 2, 3, 5, 37

Why are those the prime factors of the number 319,680?

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 319,680

319,680
Factor Arrows
2159,840
Factor Arrows
279,920
Factor Arrows
239,960
Factor Arrows
219,980
Factor Arrows
29,990
Factor Arrows
24,995
Factor Arrows
31,665
Factor Arrows
3555
Factor Arrows
3185
Factor Arrows
537

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, 37

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 3 x 3 x 3 x 5 x 37 = 319,680

This can also be written as 26 x 33 x 51 x 371 = 319,680

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


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