Q: What are the prime factors of the number 121,231,341?

 A: 3, 7, 11, 67, 373

Why are those the prime factors of the number 121,231,341?

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 121,231,341

121,231,341
Factor Arrows
340,410,447
Factor Arrows
313,470,149
Factor Arrows
71,924,307
Factor Arrows
7274,901
Factor Arrows
1124,991
Factor Arrows
67373

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:

3, 7, 11, 67, 373

We can check our work by multiplying all of the prime factors together: 3 x 3 x 7 x 7 x 11 x 67 x 373 = 121,231,341

This can also be written as 32 x 72 x 111 x 671 x 3731 = 121,231,341

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


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