Q: What are the prime factors of the number 21,596,544?

 A: 2, 3, 2083

Why are those the prime factors of the number 21,596,544?

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 21,596,544

21,596,544
Factor Arrows
210,798,272
Factor Arrows
25,399,136
Factor Arrows
22,699,568
Factor Arrows
21,349,784
Factor Arrows
2674,892
Factor Arrows
2337,446
Factor Arrows
2168,723
Factor Arrows
356,241
Factor Arrows
318,747
Factor Arrows
36,249
Factor Arrows
32,083

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, 2083

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 2 x 3 x 3 x 3 x 3 x 2,083 = 21,596,544

This can also be written as 27 x 34 x 2,0831 = 21,596,544

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


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