Q: What are the prime factors of the number 121,176,672?

 A: 2, 3, 199, 6343

Why are those the prime factors of the number 121,176,672?

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 121,176,672

121,176,672
Factor Arrows
260,588,336
Factor Arrows
230,294,168
Factor Arrows
215,147,084
Factor Arrows
27,573,542
Factor Arrows
23,786,771
Factor Arrows
31,262,257
Factor Arrows
1996,343

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, 199, 6343

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 199 x 6,343 = 121,176,672

This can also be written as 25 x 31 x 1991 x 6,3431 = 121,176,672

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


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