Q: What are the prime factors of the number 16,290,560?

 A: 2, 5, 11, 13, 89

Why are those the prime factors of the number 16,290,560?

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 16,290,560

16,290,560
Factor Arrows
28,145,280
Factor Arrows
24,072,640
Factor Arrows
22,036,320
Factor Arrows
21,018,160
Factor Arrows
2509,080
Factor Arrows
2254,540
Factor Arrows
2127,270
Factor Arrows
263,635
Factor Arrows
512,727
Factor Arrows
111,157
Factor Arrows
1389

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, 5, 11, 13, 89

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 2 x 5 x 11 x 13 x 89 = 16,290,560

This can also be written as 28 x 51 x 111 x 131 x 891 = 16,290,560

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


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