∫ Утверждение Mathlib
perfect_iff_not_abundant_and_not_deficient
Mathlib.NumberTheory.FactorisationProperties
URI: https://scilib.ai/kg/mathlib#Nat.perfect_iff_not_abundant_and_not_deficient
∫ Утверждение Mathlib
Mathlib.NumberTheory.FactorisationProperties
URI: https://scilib.ai/kg/mathlib#Nat.perfect_iff_not_abundant_and_not_deficient