Q: What are the prime factors of the number 499,905?

 A: 3, 5, 7, 23

Why are those the prime factors of the number 499,905?

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 499,905

499,905
Factor Arrows
3166,635
Factor Arrows
355,545
Factor Arrows
318,515
Factor Arrows
53,703
Factor Arrows
7529
Factor Arrows
2323

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:

3, 5, 7, 23

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 5 x 7 x 23 x 23 = 499,905

This can also be written as 33 x 51 x 71 x 232 = 499,905

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


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