Q: What are the prime factors of the number 16,303,680?

 A: 2, 3, 5, 17, 37

Why are those the prime factors of the number 16,303,680?

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 16,303,680

16,303,680
Factor Arrows
28,151,840
Factor Arrows
24,075,920
Factor Arrows
22,037,960
Factor Arrows
21,018,980
Factor Arrows
2509,490
Factor Arrows
2254,745
Factor Arrows
384,915
Factor Arrows
328,305
Factor Arrows
39,435
Factor Arrows
33,145
Factor Arrows
5629
Factor Arrows
1737

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, 17, 37

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 3 x 3 x 3 x 3 x 5 x 17 x 37 = 16,303,680

This can also be written as 26 x 34 x 51 x 171 x 371 = 16,303,680

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


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