Q: What are the prime factors of the number 51,112,620?

 A: 2, 3, 5, 13, 809

Why are those the prime factors of the number 51,112,620?

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 51,112,620

51,112,620
Factor Arrows
225,556,310
Factor Arrows
212,778,155
Factor Arrows
34,259,385
Factor Arrows
31,419,795
Factor Arrows
3473,265
Factor Arrows
3157,755
Factor Arrows
352,585
Factor Arrows
510,517
Factor Arrows
13809

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, 5, 13, 809

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 5 x 13 x 809 = 51,112,620

This can also be written as 22 x 35 x 51 x 131 x 8091 = 51,112,620

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


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