Q: What are the prime factors of the number 121,111,524?

 A: 2, 3, 101, 3701

Why are those the prime factors of the number 121,111,524?

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 121,111,524

121,111,524
Factor Arrows
260,555,762
Factor Arrows
230,277,881
Factor Arrows
310,092,627
Factor Arrows
33,364,209
Factor Arrows
31,121,403
Factor Arrows
3373,801
Factor Arrows
1013,701

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, 101, 3701

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 101 x 3,701 = 121,111,524

This can also be written as 22 x 34 x 1011 x 3,7011 = 121,111,524

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


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