Q: What are the prime factors of the number 135,424?

 A: 2, 23

Why are those the prime factors of the number 135,424?

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 135,424

135,424
Factor Arrows
267,712
Factor Arrows
233,856
Factor Arrows
216,928
Factor Arrows
28,464
Factor Arrows
24,232
Factor Arrows
22,116
Factor Arrows
21,058
Factor Arrows
2529
Factor Arrows
2323

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, 23

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 23 x 23 = 135,424

This can also be written as 28 x 232 = 135,424

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


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