Q: What are the prime factors of the number 807,408?

 A: 2, 3, 7, 89

Why are those the prime factors of the number 807,408?

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 807,408

807,408
Factor Arrows
2403,704
Factor Arrows
2201,852
Factor Arrows
2100,926
Factor Arrows
250,463
Factor Arrows
316,821
Factor Arrows
35,607
Factor Arrows
31,869
Factor Arrows
3623
Factor Arrows
789

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, 7, 89

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 7 x 89 = 807,408

This can also be written as 24 x 34 x 71 x 891 = 807,408

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


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