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untouchable number

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positive integer unexpressable as the sum of all proper divisors of any other integer

External resources

Freebase ID
Microsoft Academic ID
OEIS ID
BabelNet ID
MathWorld ID

nënklasë e

pjesë e

set of untouchable numbers

cardinality of this set

mirëmbahet nga WikiProjekti

WikiProject Mathematics

Reference

  1. ^ Freebase Data Dumps, 28 tetor 2013
  2. ^ BabelNet