Q: What are the prime factors of the number 138,866,268?

 A: 2, 3, 17, 29, 23473

Why are those the prime factors of the number 138,866,268?

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 138,866,268

138,866,268
Factor Arrows
269,433,134
Factor Arrows
234,716,567
Factor Arrows
311,572,189
Factor Arrows
17680,717
Factor Arrows
2923,473

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, 29, 23473

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 17 x 29 x 23,473 = 138,866,268

This can also be written as 22 x 31 x 171 x 291 x 23,4731 = 138,866,268

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


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