Numbers k such that sigma(k+1) divides sigma(k), where sigma(k) is the sum of positive divisors of k.
A058073
Numbers k such that sigma(k+1) divides sigma(k), where sigma(k) is the sum of positive divisors of k.
Terms
- a(0) =12a(1) =14a(2) =70a(3) =88a(4) =180a(5) =204a(6) =206a(7) =220a(8) =957a(9) =1334a(10) =1364a(11) =1634a(12) =1750a(13) =1888a(14) =2685a(15) =2958a(16) =2974a(17) =4364a(18) =8142a(19) =8632a(20) =9114a(21) =12000a(22) =14664a(23) =14841a(24) =18414a(25) =18762a(26) =18873a(27) =19358a(28) =20118a(29) =20145
External references
- oeis: A058073