Numbers n such that for some positive number k, z=n+ik is a complex multiperfect number; that is, z divides sigma(z), where sigma is the sum of divisors function extended to the complex numbers.
A102506
Numbers n such that for some positive number k, z=n+ik is a complex multiperfect number; that is, z divides sigma(z), where sigma is the sum of divisors function extended to the complex numbers.
Terms
- a(0) =1a(1) =5a(2) =6a(3) =10a(4) =12a(5) =28a(6) =60a(7) =72a(8) =100a(9) =108a(10) =120a(11) =140a(12) =150a(13) =204a(14) =263a(15) =300a(16) =526a(17) =600a(18) =672a(19) =720a(20) =912a(21) =1200a(22) =1470a(23) =1520a(24) =1704a(25) =3600a(26) =4560a(27) =4680a(28) =4828a(29) =5584
External references
- oeis: A102506