Numbers k such that the sum of the squares of the divisors of k is divisible by k.

Terms

a(0) =1a(1) =10a(2) =60a(3) =65a(4) =84a(5) =130a(6) =140a(7) =150a(8) =175a(9) =260a(10) =350a(11) =420a(12) =525a(13) =780a(14) =1050a(15) =1105a(16) =1820a(17) =2100a(18) =2210a(19) =4420a(20) =4650a(21) =5425a(22) =5460a(23) =8840a(24) =10500a(25) =10850a(26) =13260a(27) =16275a(28) =19720a(29) =20150