Numbers m such that the concatenation of k and the k-th divisor of m is equal to m for some k.

Terms

a(0) =11a(1) =22a(2) =25a(3) =410a(4) =425a(5) =620a(6) =735a(7) =816a(8) =832a(9) =850a(10) =975a(11) =1280a(12) =1872a(13) =5125a(14) =7175a(15) =12500a(16) =14200a(17) =17200a(18) =19250a(19) =24150a(20) =42336a(21) =46920a(22) =141250a(23) =222500a(24) =251250a(25) =262000a(26) =291450a(27) =305000a(28) =402500a(29) =442750