Q: What are the prime factors of the number 405,434,322?

 A: 2, 3, 41, 20347

Why are those the prime factors of the number 405,434,322?

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 405,434,322

405,434,322
Factor Arrows
2202,717,161
Factor Arrows
367,572,387
Factor Arrows
322,524,129
Factor Arrows
37,508,043
Factor Arrows
32,502,681
Factor Arrows
3834,227
Factor Arrows
4120,347

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, 41, 20347

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 3 x 41 x 20,347 = 405,434,322

This can also be written as 21 x 35 x 411 x 20,3471 = 405,434,322

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


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