Q: What are the prime factors of the number 316,224?

 A: 2, 3, 61

Why are those the prime factors of the number 316,224?

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 316,224

316,224
Factor Arrows
2158,112
Factor Arrows
279,056
Factor Arrows
239,528
Factor Arrows
219,764
Factor Arrows
29,882
Factor Arrows
24,941
Factor Arrows
31,647
Factor Arrows
3549
Factor Arrows
3183
Factor Arrows
361

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, 61

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 3 x 61 = 316,224

This can also be written as 26 x 34 x 611 = 316,224

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


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