untouchable number

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