Q: What are the prime factors of the number 405,101,136?

 A: 2, 3, 11, 311, 2467

Why are those the prime factors of the number 405,101,136?

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 405,101,136

405,101,136
Factor Arrows
2202,550,568
Factor Arrows
2101,275,284
Factor Arrows
250,637,642
Factor Arrows
225,318,821
Factor Arrows
38,439,607
Factor Arrows
11767,237
Factor Arrows
3112,467

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, 311, 2467

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 11 x 311 x 2,467 = 405,101,136

This can also be written as 24 x 31 x 111 x 3111 x 2,4671 = 405,101,136

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


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