A232702 Sigma(2*m)/m for m such that sigma(2*m) is divisible by m (these m are in A227302).

3, 4, 5, 4, 6, 4, 6, 7, 7, 4, 7, 8, 8, 6, 8, 9, 9, 7, 8, 4, 8, 5, 8, 7, 6, 8, 6, 9, 4, 5, 10, 7, 10, 8, 6, 7, 9, 8, 4, 8, 9, 8, 10, 8, 10, 11, 10, 8, 10, 10, 9, 8, 8, 9

Offset: 1

Author

Alex Ratushnyak, Nov 28 2013

Keywords

• nonn
• more
• less

Crossrefs

Cf. A227302, A054030.

Programs

PARI

for(n=1,10^8,s=sigma(2*n);if(s%n==0,print1(s/n,","))) \\ Ralf Stephan, Nov 30 2013

Extensions

a(30)-a(54) from Jinyuan Wang, Mar 03 2020