Q: What are the prime factors of the number 121,231,104?

 A: 2, 3, 43, 3671

Why are those the prime factors of the number 121,231,104?

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 121,231,104

121,231,104
Factor Arrows
260,615,552
Factor Arrows
230,307,776
Factor Arrows
215,153,888
Factor Arrows
27,576,944
Factor Arrows
23,788,472
Factor Arrows
21,894,236
Factor Arrows
2947,118
Factor Arrows
2473,559
Factor Arrows
3157,853
Factor Arrows
433,671

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, 43, 3671

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 43 x 3,671 = 121,231,104

This can also be written as 28 x 31 x 431 x 3,6711 = 121,231,104

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


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