Q: What are the prime factors of the number 135,381,639?

 A: 3, 73, 97, 6373

Why are those the prime factors of the number 135,381,639?

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 135,381,639

135,381,639
Factor Arrows
345,127,213
Factor Arrows
73618,181
Factor Arrows
976,373

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, 73, 97, 6373

We can check our work by multiplying all of the prime factors together: 3 x 73 x 97 x 6,373 = 135,381,639

This can also be written as 31 x 731 x 971 x 6,3731 = 135,381,639

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


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