Q: What are the prime factors of the number 317,988?

 A: 2, 3, 11, 73

Why are those the prime factors of the number 317,988?

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 317,988

317,988
Factor Arrows
2158,994
Factor Arrows
279,497
Factor Arrows
326,499
Factor Arrows
38,833
Factor Arrows
11803
Factor Arrows
1173

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, 11, 73

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 11 x 11 x 73 = 317,988

This can also be written as 22 x 32 x 112 x 731 = 317,988

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


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