a(n) is the least number k such that there is a set of n proper divisors of k whose sum is k, and no set of fewer than n proper divisors of k whose sum is k.
A389712
a(n) is the least number k such that there is a set of n proper divisors of k whose sum is k, and no set of fewer than n proper divisors of k whose sum is k.
Terms
- a(0) =6a(1) =20a(2) =28a(3) =88a(4) =304a(5) =368a(6) =496a(7) =650a(8) =945a(9) =3230a(10) =2205a(11) =11096a(12) =12705a(13) =20482a(14) =22275a(15) =51850a(16) =7425a(17) =107198a(18) =8925a(19) =126854a(20) =51765a(21) =253946a(22) =46035a(23) =592670a(24) =81081a(25) =133042a(26) =223839a(27) =956650a(28) =78975a(29) =1733750
External references
- oeis: A389712