Q: What are the prime factors of the number 13,581,760?

 A: 2, 5, 42443

Why are those the prime factors of the number 13,581,760?

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 13,581,760

13,581,760
Factor Arrows
26,790,880
Factor Arrows
23,395,440
Factor Arrows
21,697,720
Factor Arrows
2848,860
Factor Arrows
2424,430
Factor Arrows
2212,215
Factor Arrows
542,443

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, 5, 42443

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 5 x 42,443 = 13,581,760

This can also be written as 26 x 51 x 42,4431 = 13,581,760

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


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