Generate and show here, the first twenty Perfect totient numbers.



Related task

   Totient function


Also see

   the OEIS entry for   perfect totient numbers.
   mrob   list of the first 54


(⊢(/⍨)((+/((1+.=⍳∨⊢)∘⊃,⊢)⍣(1=(⊃⊣)))=2∘×)¨)1↓⍳6000