44047domain: NAppears in sequencesNumbers whose sum of divisors is a sixth power.at n=28A019424Numbers whose sum of divisors is 6^6 = 46656.at n=25A048256Numbers k such that 61*2^k-1 is prime.at n=33A050556Interprimes which are of the form s*prime, s=17.at n=18A075292