Q: What are the prime factors of the number 697,809?

 A: 3, 7, 47, 101

Why are those the prime factors of the number 697,809?

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 697,809

697,809
Factor Arrows
3232,603
Factor Arrows
733,229
Factor Arrows
74,747
Factor Arrows
47101

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, 47, 101

We can check our work by multiplying all of the prime factors together: 3 x 7 x 7 x 47 x 101 = 697,809

This can also be written as 31 x 72 x 471 x 1011 = 697,809

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


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