Q: What are the prime factors of the number 20,411,028?

 A: 2, 3, 11, 23, 83

Why are those the prime factors of the number 20,411,028?

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 20,411,028

20,411,028
Factor Arrows
210,205,514
Factor Arrows
25,102,757
Factor Arrows
31,700,919
Factor Arrows
3566,973
Factor Arrows
3188,991
Factor Arrows
362,997
Factor Arrows
320,999
Factor Arrows
111,909
Factor Arrows
2383

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, 23, 83

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 3 x 3 x 11 x 23 x 83 = 20,411,028

This can also be written as 22 x 35 x 111 x 231 x 831 = 20,411,028

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


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