Q: What are the prime factors of the number 405,443,264?

 A: 2, 23, 67, 4111

Why are those the prime factors of the number 405,443,264?

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 405,443,264

405,443,264
Factor Arrows
2202,721,632
Factor Arrows
2101,360,816
Factor Arrows
250,680,408
Factor Arrows
225,340,204
Factor Arrows
212,670,102
Factor Arrows
26,335,051
Factor Arrows
23275,437
Factor Arrows
674,111

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, 23, 67, 4111

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 23 x 67 x 4,111 = 405,443,264

This can also be written as 26 x 231 x 671 x 4,1111 = 405,443,264

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


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