Q: What are the prime factors of the number 669,900?

 A: 2, 3, 5, 7, 11, 29

Why are those the prime factors of the number 669,900?

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 669,900

669,900
Factor Arrows
2334,950
Factor Arrows
2167,475
Factor Arrows
355,825
Factor Arrows
511,165
Factor Arrows
52,233
Factor Arrows
7319
Factor Arrows
1129

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, 7, 11, 29

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 5 x 7 x 11 x 29 = 669,900

This can also be written as 22 x 31 x 52 x 71 x 111 x 291 = 669,900

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


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