Unitary deficient-perfect numbers: unitary deficient numbers k such that 2*k-usigma(k) is a unitary divisor of k, where usigma is the sum of unitary divisors of k (A034448).
A303356
Unitary deficient-perfect numbers: unitary deficient numbers k such that 2*k-usigma(k) is a unitary divisor of k, where usigma is the sum of unitary divisors of k (A034448).
Terms
- a(0) =1a(1) =2a(2) =10a(3) =12a(4) =120a(5) =4080a(6) =5280a(7) =6720a(8) =17472a(9) =137280a(10) =174720a(11) =908160a(12) =29621760a(13) =31100160a(14) =41879040a(15) =89806080a(16) =99240960a(17) =101391360a(18) =143969280a(19) =226652160a(20) =466794240a(21) =732103680a(22) =760488960a(23) =779412480a(24) =916016640a(25) =918382080a(26) =951498240a(27) =1001172480a(28) =1365450240a(29) =3151948800
External references
- oeis: A303356