USEMO 2021 Problem 2

Find all integers $n\ge1$ such that $2^n-1$ has exactly $n$ positive integer divisors.

Proposed by Ankan Bhattacharya

Dataset text AI-MO AoPS. Quoted with source.

Solutions

No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.