A035322 Sum of composite divisors of n that are less than n and are not primes nor prime powers.

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 6, 0, 10, 0, 0, 0, 18, 0, 0, 0, 14, 0, 31, 0, 0, 0, 0, 0, 36, 0, 0, 0, 30, 0, 41, 0, 22, 15, 0, 0, 42, 0, 10, 0, 26, 0, 24, 0, 42, 0, 0, 0, 93, 0, 0, 21, 0, 0, 61, 0, 34, 0, 59, 0, 96, 0, 0, 15, 38, 0, 71, 0, 70, 0, 0, 0, 123, 0, 0, 0, 66, 0

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A000203, A035321, A023891, A060278.

Programs

Mathematica

Table[ Plus @@ Select[ Divisors[ n ], (Length[ FactorInteger[ # ] ]>1 && #Harvey P. Dale, Jan 09 2019 *)

Extensions

Description corrected by Jack Brennen, Mar 28 2001