Q: What are the prime factors of the number 123,525,768?

 A: 2, 3, 149, 34543

Why are those the prime factors of the number 123,525,768?

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 123,525,768

123,525,768
Factor Arrows
261,762,884
Factor Arrows
230,881,442
Factor Arrows
215,440,721
Factor Arrows
35,146,907
Factor Arrows
14934,543

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, 149, 34543

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 149 x 34,543 = 123,525,768

This can also be written as 23 x 31 x 1491 x 34,5431 = 123,525,768

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


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