Q: What are the prime factors of the number 121,446?

 A: 2, 3, 13, 173

Why are those the prime factors of the number 121,446?

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 121,446

121,446
Factor Arrows
260,723
Factor Arrows
320,241
Factor Arrows
36,747
Factor Arrows
32,249
Factor Arrows
13173

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, 173

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 13 x 173 = 121,446

This can also be written as 21 x 33 x 131 x 1731 = 121,446

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


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