Q: What are the prime factors of the number 21,366,048?

 A: 2, 3, 11, 20233

Why are those the prime factors of the number 21,366,048?

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 21,366,048

21,366,048
Factor Arrows
210,683,024
Factor Arrows
25,341,512
Factor Arrows
22,670,756
Factor Arrows
21,335,378
Factor Arrows
2667,689
Factor Arrows
3222,563
Factor Arrows
1120,233

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, 11, 20233

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 11 x 20,233 = 21,366,048

This can also be written as 25 x 31 x 111 x 20,2331 = 21,366,048

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


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