81045800

素因数分解:

$2^3\times 5^2\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{197}}^1$

素因数の和:252

約数の個数: 144

約数和(自身を含む): 220415580

約数和(自身を除く): 139369780

約数列:

[1, 2, 4, 5, 8, 10, 11, 17, 20, 22, 25, 34, 40, 44, 50, 55, 68, 85, 88, 100, 110, 121, 136, 170, 187, 197, 200, 220, 242, 275, 340, 374, 394, 425, 440, 484, 550, 605, 680, 748, 788, 850, 935, 968, 985, 1100, 1210, 1496, 1576, 1700, 1870, 1970, 2057, 2167, 2200, 2420, 3025, 3349, 3400, 3740, 3940, 4114, 4334, 4675, 4840, 4925, 6050, 6698, 7480, 7880, 8228, 8668, 9350, 9850, 10285, 10835, 12100, 13396, 16456, 16745, 17336, 18700, 19700, 20570, 21670, 23837, 24200, 26792, 33490, 36839, 37400, 39400, 41140, 43340, 47674, 51425, 54175, 66980, 73678, 82280, 83725, 86680, 95348, 102850, 108350, 119185, 133960, 147356, 167450, 184195, 190696, 205700, 216700, 238370, 294712, 334900, 368390, 405229, 411400, 433400, 476740, 595925, 669800, 736780, 810458, 920975, 953480, 1191850, 1473560, 1620916, 1841950, 2026145, 2383700, 3241832, 3683900, 4052290, 4767400, 7367800, 8104580, 10130725, 16209160, 20261450, 40522900, 81045800]

約数ペア:

[(1, 81045800), (2, 40522900), (4, 20261450), (5, 16209160), (8, 10130725), (10, 8104580), (11, 7367800), (17, 4767400), (20, 4052290), (22, 3683900), (25, 3241832), (34, 2383700), (40, 2026145), (44, 1841950), (50, 1620916), (55, 1473560), (68, 1191850), (85, 953480), (88, 920975), (100, 810458), (110, 736780), (121, 669800), (136, 595925), (170, 476740), (187, 433400), (197, 411400), (200, 405229), (220, 368390), (242, 334900), (275, 294712), (340, 238370), (374, 216700), (394, 205700), (425, 190696), (440, 184195), (484, 167450), (550, 147356), (605, 133960), (680, 119185), (748, 108350), (788, 102850), (850, 95348), (935, 86680), (968, 83725), (985, 82280), (1100, 73678), (1210, 66980), (1496, 54175), (1576, 51425), (1700, 47674), (1870, 43340), (1970, 41140), (2057, 39400), (2167, 37400), (2200, 36839), (2420, 33490), (3025, 26792), (3349, 24200), (3400, 23837), (3740, 21670), (3940, 20570), (4114, 19700), (4334, 18700), (4675, 17336), (4840, 16745), (4925, 16456), (6050, 13396), (6698, 12100), (7480, 10835), (7880, 10285), (8228, 9850), (8668, 9350)]