Q: What are the prime factors of the number 121,200,123?

 A: 3, 11, 17, 37, 5839

Why are those the prime factors of the number 121,200,123?

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 121,200,123

121,200,123
Factor Arrows
340,400,041
Factor Arrows
113,672,731
Factor Arrows
17216,043
Factor Arrows
375,839

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, 11, 17, 37, 5839

We can check our work by multiplying all of the prime factors together: 3 x 11 x 17 x 37 x 5,839 = 121,200,123

This can also be written as 31 x 111 x 171 x 371 x 5,8391 = 121,200,123

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


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