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Integers not overtaken by m + τ(m)
Find n > 24 such that m + τ(m) ≤ n + 2 for every m < n, where τ counts divisors, or prove that none exists.
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| 1 | +{ | |
| 2 | + "domain": "mathematics", | |
| 3 | + "topics": [ | |
| 4 | + "number-theory" | |
| 5 | + ], | |
| 6 | + "type": "construction", | |
| 7 | + "also": [ | |
| 8 | + "proof" | |
| 9 | + ], | |
| 10 | + "source": { | |
| 11 | + "key": "erdos", | |
| 12 | + "name": "Erdős Problems", | |
| 13 | + "url": "https://www.erdosproblems.com/647", | |
| 14 | + "id": "647", | |
| 15 | + "curator": "Thomas Bloom", | |
| 16 | + "poser": "Paul Erdős and John Selfridge", | |
| 17 | + "status": "open, £25 prize", | |
| 18 | + "as_of": "2026-10-20", | |
| 19 | + "prize": "£25", | |
| 20 | + "catalog": "0521c19bbd38" | |
| 21 | + } | |
| 22 | +} | |