Numbers n such that the product of n and the sum of the reciprocal of their anti-divisors is an integer.

A272890

Numbers n such that the product of n and the sum of the reciprocal of their anti-divisors is an integer.

Terms

    a(0) =9a(1) =36a(2) =441a(3) =576a(4) =1296a(5) =1764a(6) =2025a(7) =7569a(8) =10404a(9) =17424a(10) =23409a(11) =34596a(12) =41616a(13) =51984a(14) =56169a(15) =74529a(16) =88209a(17) =90000a(18) =103041a(19) =140625a(20) =181476a(21) =194481a(22) =219024a(23) =236196a(24) =239121a(25) =269361a(26) =324900a(27) =367236a(28) =404496a(29) =480249

External references