Q: What are the prime factors of the number 11,280?

 A: 2, 3, 5, 47

Why are those the prime factors of the number 11,280?

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 11,280

11,280
Factor Arrows
25,640
Factor Arrows
22,820
Factor Arrows
21,410
Factor Arrows
2705
Factor Arrows
3235
Factor Arrows
547

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, 47

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 47 = 11,280

This can also be written as 24 x 31 x 51 x 471 = 11,280

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


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