Q: What are the prime factors of the number 499,968?

 A: 2, 3, 7, 31

Why are those the prime factors of the number 499,968?

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 499,968

499,968
Factor Arrows
2249,984
Factor Arrows
2124,992
Factor Arrows
262,496
Factor Arrows
231,248
Factor Arrows
215,624
Factor Arrows
27,812
Factor Arrows
23,906
Factor Arrows
21,953
Factor Arrows
3651
Factor Arrows
3217
Factor Arrows
731

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, 7, 31

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 2 x 2 x 3 x 3 x 7 x 31 = 499,968

This can also be written as 28 x 32 x 71 x 311 = 499,968

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


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