Q: What are the prime factors of the number 121,201,425?

 A: 3, 5, 313, 1721

Why are those the prime factors of the number 121,201,425?

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 121,201,425

121,201,425
Factor Arrows
340,400,475
Factor Arrows
313,466,825
Factor Arrows
52,693,365
Factor Arrows
5538,673
Factor Arrows
3131,721

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, 5, 313, 1721

We can check our work by multiplying all of the prime factors together: 3 x 3 x 5 x 5 x 313 x 1,721 = 121,201,425

This can also be written as 32 x 52 x 3131 x 1,7211 = 121,201,425

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


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