2008 AMC 10A Problems/Problem 3
Contents
[hide]Problem
For the positive integer , let denote the sum of all the positive divisors of with the exception of itself. For example, and . What is ?
Solution 1
Solution 2
Since is a perfect number, any such operation where will yield as the answer.
Note: A perfect number is defined as a number that equals the sum of its positive divisors excluding itself.
See also
2008 AMC 10A (Problems • Answer Key • Resources) | ||
Preceded by Problem 2 |
Followed by Problem 4 | |
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