Q: What are the prime factors of the number 135,648?

 A: 2, 3, 157

Why are those the prime factors of the number 135,648?

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 135,648

135,648
Factor Arrows
267,824
Factor Arrows
233,912
Factor Arrows
216,956
Factor Arrows
28,478
Factor Arrows
24,239
Factor Arrows
31,413
Factor Arrows
3471
Factor Arrows
3157

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, 157

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 157 = 135,648

This can also be written as 25 x 33 x 1571 = 135,648

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


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