Semi-unitary perfect numbers: numbers k such that susigma(k) = 2k, where susigma(k) is the sum of the semi-unitary divisors of k (A322485).
A322486
Semi-unitary perfect numbers: numbers k such that susigma(k) = 2k, where susigma(k) is the sum of the semi-unitary divisors of k (A322485).
Terms
- a(0) =6a(1) =60a(2) =90a(3) =264a(4) =3960a(5) =4560a(6) =8736a(7) =13770a(8) =131040a(9) =384384a(10) =605880a(11) =5765760a(12) =20049120a(13) =882161280a(14) =23253135360
External references
- oeis: A322486