192855domain: NAppears in sequencesNumbers k such that sigma(k) = 4*phi(k).at n=27A068390Numbers k such that k, 2*k and 4*k are balanced numbers (A020492).at n=31A076376Numbers k such that k, 2*k, 4*k and 8*k are balanced numbers (A020492).at n=11A076377