Q: What are the prime factors of the number 423,123,132?

 A: 2, 3, 17, 487, 4259

Why are those the prime factors of the number 423,123,132?

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 423,123,132

423,123,132
Factor Arrows
2211,561,566
Factor Arrows
2105,780,783
Factor Arrows
335,260,261
Factor Arrows
172,074,133
Factor Arrows
4874,259

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, 17, 487, 4259

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 17 x 487 x 4,259 = 423,123,132

This can also be written as 22 x 31 x 171 x 4871 x 4,2591 = 423,123,132

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


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