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