Q: What are the prime factors of the number 49,109,220?

 A: 2, 3, 5, 199, 457

Why are those the prime factors of the number 49,109,220?

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 49,109,220

49,109,220
Factor Arrows
224,554,610
Factor Arrows
212,277,305
Factor Arrows
34,092,435
Factor Arrows
31,364,145
Factor Arrows
3454,715
Factor Arrows
590,943
Factor Arrows
199457

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, 199, 457

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 5 x 199 x 457 = 49,109,220

This can also be written as 22 x 33 x 51 x 1991 x 4571 = 49,109,220

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


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