Q: What are the prime factors of the number 669,696?

 A: 2, 3, 109

Why are those the prime factors of the number 669,696?

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 669,696

669,696
Factor Arrows
2334,848
Factor Arrows
2167,424
Factor Arrows
283,712
Factor Arrows
241,856
Factor Arrows
220,928
Factor Arrows
210,464
Factor Arrows
25,232
Factor Arrows
22,616
Factor Arrows
21,308
Factor Arrows
2654
Factor Arrows
2327
Factor Arrows
3109

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, 109

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 2 x 2 x 2 x 3 x 109 = 669,696

This can also be written as 211 x 31 x 1091 = 669,696

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


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