Q: What are the prime factors of the number 409,344?

 A: 2, 3, 13, 41

Why are those the prime factors of the number 409,344?

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 409,344

409,344
Factor Arrows
2204,672
Factor Arrows
2102,336
Factor Arrows
251,168
Factor Arrows
225,584
Factor Arrows
212,792
Factor Arrows
26,396
Factor Arrows
23,198
Factor Arrows
21,599
Factor Arrows
3533
Factor Arrows
1341

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, 13, 41

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 3 x 13 x 41 = 409,344

This can also be written as 28 x 31 x 131 x 411 = 409,344

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


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