Q: What are the prime factors of the number 20,747,584?

 A: 2, 11, 13, 2267

Why are those the prime factors of the number 20,747,584?

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 20,747,584

20,747,584
Factor Arrows
210,373,792
Factor Arrows
25,186,896
Factor Arrows
22,593,448
Factor Arrows
21,296,724
Factor Arrows
2648,362
Factor Arrows
2324,181
Factor Arrows
1129,471
Factor Arrows
132,267

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, 11, 13, 2267

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 11 x 13 x 2,267 = 20,747,584

This can also be written as 26 x 111 x 131 x 2,2671 = 20,747,584

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


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