Numbers whose abundancy sigma(n)/n is a rational cube.

Terms

a(0) =1a(1) =8232a(2) =32640a(3) =265825a(4) =3846879a(5) =6517665a(6) =14705145a(7) =16926000a(8) =31441920a(9) =56471688a(10) =146475000a(11) =211421364a(12) =277368000a(13) =369022500a(14) =662518050a(15) =679568670a(16) =968353620a(17) =2166699360a(18) =3091750900a(19) =3755367252a(20) =4122716598a(21) =6536970000a(22) =9740587500a(23) =10066738500a(24) =12423246290