Q: What are the prime factors of the number 11,881,320?

 A: 2, 3, 5, 11, 9001

Why are those the prime factors of the number 11,881,320?

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 11,881,320

11,881,320
Factor Arrows
25,940,660
Factor Arrows
22,970,330
Factor Arrows
21,485,165
Factor Arrows
3495,055
Factor Arrows
599,011
Factor Arrows
119,001

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, 9001

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 11 x 9,001 = 11,881,320

This can also be written as 23 x 31 x 51 x 111 x 9,0011 = 11,881,320

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


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