Q: What are the prime factors of the number 20,116,512?

 A: 2, 3, 13, 199

Why are those the prime factors of the number 20,116,512?

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 20,116,512

20,116,512
Factor Arrows
210,058,256
Factor Arrows
25,029,128
Factor Arrows
22,514,564
Factor Arrows
21,257,282
Factor Arrows
2628,641
Factor Arrows
3209,547
Factor Arrows
369,849
Factor Arrows
323,283
Factor Arrows
37,761
Factor Arrows
32,587
Factor Arrows
13199

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, 13, 199

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 3 x 13 x 199 = 20,116,512

This can also be written as 25 x 35 x 131 x 1991 = 20,116,512

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


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