Numbers k that have at least one unitary divisor d such that sigma(d)*d is equal to k.

Terms

a(0) =1a(1) =6a(2) =12a(3) =28a(4) =30a(5) =56a(6) =117a(7) =120a(8) =132a(9) =182a(10) =306a(11) =380a(12) =496a(13) =552a(14) =672a(15) =775a(16) =870a(17) =992a(18) =1080a(19) =1406a(20) =1680a(21) =1722a(22) =1892a(23) =2016a(24) =2184a(25) =2256a(26) =2793a(27) =2862a(28) =3276a(29) =3540