Q: What are the prime factors of the number 405,316,032?

 A: 2, 3, 11, 191911

Why are those the prime factors of the number 405,316,032?

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 405,316,032

405,316,032
Factor Arrows
2202,658,016
Factor Arrows
2101,329,008
Factor Arrows
250,664,504
Factor Arrows
225,332,252
Factor Arrows
212,666,126
Factor Arrows
26,333,063
Factor Arrows
32,111,021
Factor Arrows
11191,911

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, 11, 191911

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 3 x 11 x 191,911 = 405,316,032

This can also be written as 26 x 31 x 111 x 191,9111 = 405,316,032

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


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