18639280

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{359}}^1$

素因数の和:442

約数の個数: 80

約数和(自身を含む): 48211200

約数和(自身を除く): 29571920

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 59, 80, 88, 110, 118, 176, 220, 236, 295, 359, 440, 472, 590, 649, 718, 880, 944, 1180, 1298, 1436, 1795, 2360, 2596, 2872, 3245, 3590, 3949, 4720, 5192, 5744, 6490, 7180, 7898, 10384, 12980, 14360, 15796, 19745, 21181, 25960, 28720, 31592, 39490, 42362, 51920, 63184, 78980, 84724, 105905, 157960, 169448, 211810, 232991, 315920, 338896, 423620, 465982, 847240, 931964, 1164955, 1694480, 1863928, 2329910, 3727856, 4659820, 9319640, 18639280]

約数ペア:

[(1, 18639280), (2, 9319640), (4, 4659820), (5, 3727856), (8, 2329910), (10, 1863928), (11, 1694480), (16, 1164955), (20, 931964), (22, 847240), (40, 465982), (44, 423620), (55, 338896), (59, 315920), (80, 232991), (88, 211810), (110, 169448), (118, 157960), (176, 105905), (220, 84724), (236, 78980), (295, 63184), (359, 51920), (440, 42362), (472, 39490), (590, 31592), (649, 28720), (718, 25960), (880, 21181), (944, 19745), (1180, 15796), (1298, 14360), (1436, 12980), (1795, 10384), (2360, 7898), (2596, 7180), (2872, 6490), (3245, 5744), (3590, 5192), (3949, 4720)]