@Dolfin:
d7777 = (1752) = 1752
d7777 = (1752) = 1752d2020 = (915) = 915d2020 = (1608) = 1608d2020 = (472) = 472d2020 = (441) = 441d2020 = (712) = 712d2020 = (178) = 178d2020 = (1238) = 1238d2020 = (462) = 462d20! = (11) = 11d11! = (6) = 6d6! = (3) = 3d3! = (3+1) = 4d4! = (1) = 1d2020! = (1973) = 1973d1973! = (1593) = 1593d1593! = (526) = 526d526! = (47) = 47d47! = (6) = 6d6! = (2) = 2d2! = (2+1) = 3d3! = (2) = 2d2! = (2+1) = 3d3! = (1) = 1d2020! = (1559) = 1559d1559! = (423) = 423d423! = (224) = 224d224! = (195) = 195d195! = (130) = 130d130! = (28) = 28d28! = (6) = 6d6! = (2) = 2