Numbers k with at least two divisors d for which sigma(k) = d*sigma(d).

Terms

a(0) =16380a(1) =290160a(2) =475020a(3) =1372140a(4) =4754880a(5) =5284356a(6) =5624892a(7) =7033572a(8) =8414640a(9) =10322676a(10) =12203100a(11) =12724908a(12) =16435692a(13) =16655184a(14) =24306480a(15) =35675640a(16) =36203076a(17) =39792060a(18) =43266132a(19) =49758720a(20) =55040076a(21) =68229252a(22) =70142436a(23) =74662476a(24) =76527360a(25) =77084280a(26) =82833660