Q: What are the prime factors of the number 144,540?

 A: 2, 3, 5, 11, 73

Why are those the prime factors of the number 144,540?

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 144,540

144,540
Factor Arrows
272,270
Factor Arrows
236,135
Factor Arrows
312,045
Factor Arrows
34,015
Factor Arrows
5803
Factor Arrows
1173

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, 5, 11, 73

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 5 x 11 x 73 = 144,540

This can also be written as 22 x 32 x 51 x 111 x 731 = 144,540

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


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