HMMT 2016 U31
- Guts
- Answer
For a positive integer , denote by the number of positive integer divisors of , and denote by the number of positive integers that are less than or equal to and relatively prime to . Call a positive integer good if . For example, the number 44 is good because . Find the sum of all good positive integers .
Dataset text NuminaMath olympiads. Quoted with source.
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