olymmath

OMCC 2014 Problem 6

  • Day 2

A positive integer nn is funny if for all positive divisors dd of nn , d+2d+2 is a prime number. Find all funny numbers with the largest possible number of divisors.

Dataset text AI-MO AoPS. Quoted with source.

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Locator centro/2014/p6 · Tag GEC18528KG · Edit this page on GitHub · Keys: j next, k previous