Q: What are the prime factors of the number 409,779?

 A: 3, 5059

Why are those the prime factors of the number 409,779?

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 409,779

409,779
Factor Arrows
3136,593
Factor Arrows
345,531
Factor Arrows
315,177
Factor Arrows
35,059

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, 5059

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 5,059 = 409,779

This can also be written as 34 x 5,0591 = 409,779

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


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