Q: What are the prime factors of the number 135,664?

 A: 2, 61, 139

Why are those the prime factors of the number 135,664?

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 135,664

135,664
Factor Arrows
267,832
Factor Arrows
233,916
Factor Arrows
216,958
Factor Arrows
28,479
Factor Arrows
61139

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, 61, 139

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 61 x 139 = 135,664

This can also be written as 24 x 611 x 1391 = 135,664

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


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