34869056domain: NAppears in sequencesPrimitive weird numbers (pwn) (A002975) whose abundance (A033880) is a power of 2 (A000079).at n=26A258250Numbers k whose abundance is 128: sigma(k) - 2*k = 128.at n=16A292626Weird admirable numbers: numbers that are both weird (A006037) and admirable (A111592).at n=27A329190