Number of divisors of (sigma(n)-n) = number of divisors of n.

Terms

a(0) =6a(1) =9a(2) =10a(3) =14a(4) =22a(5) =28a(6) =30a(7) =33a(8) =38a(9) =42a(10) =46a(11) =51a(12) =54a(13) =60a(14) =62a(15) =66a(16) =69a(17) =84a(18) =86a(19) =87a(20) =91a(21) =92a(22) =93a(23) =96a(24) =102a(25) =118a(26) =132a(27) =133a(28) =135a(29) =141