Q: What are the prime factors of the number 693?

 A: 3, 7, 11

Why are those the prime factors of the number 693?

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 693

693
Factor Arrows
3231
Factor Arrows
377
Factor Arrows
711

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, 7, 11

We can check our work by multiplying all of the prime factors together: 3 x 3 x 7 x 11 = 693

This can also be written as 32 x 71 x 111 = 693

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


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