login
31752-hyperperfect numbers: n = 31752*(sigma(n)-n-1) + 1.
7

%I #25 Dec 01 2019 21:30:42

%S 4660241041,7220722321,12994506001,52929885457,60771359377

%N 31752-hyperperfect numbers: n = 31752*(sigma(n)-n-1) + 1.

%C No other terms below 10^19. - _Max Alekseyev_, Dec 01 2019

%H J. S. McCranie, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL3/mccranie.html">A study of hyperperfect numbers</a>, J. Int. Seqs. Vol. 3 (2000) #P00.1.3.

%Y Cf. A000396, A007593, A220290, A028499-A028502.

%K hard,more,nonn

%O 1,1

%A _Jud McCranie_