81890380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1$

素因数の和:200

約数の個数: 144

約数和(自身を含む): 215843040

約数和(自身を除く): 133952660

約数列:

[1, 2, 4, 5, 10, 11, 13, 19, 20, 22, 26, 38, 44, 52, 55, 65, 76, 95, 110, 121, 130, 137, 143, 190, 209, 220, 242, 247, 260, 274, 286, 380, 418, 484, 494, 548, 572, 605, 685, 715, 836, 988, 1045, 1210, 1235, 1370, 1430, 1507, 1573, 1781, 2090, 2299, 2420, 2470, 2603, 2717, 2740, 2860, 3014, 3146, 3562, 4180, 4598, 4940, 5206, 5434, 6028, 6292, 7124, 7535, 7865, 8905, 9196, 10412, 10868, 11495, 13015, 13585, 15070, 15730, 16577, 17810, 19591, 22990, 26030, 27170, 28633, 29887, 30140, 31460, 33154, 33839, 35620, 39182, 45980, 52060, 54340, 57266, 59774, 66308, 67678, 78364, 82885, 97955, 114532, 119548, 135356, 143165, 149435, 165770, 169195, 195910, 215501, 286330, 298870, 314963, 331540, 338390, 372229, 391820, 431002, 572660, 597740, 629926, 676780, 744458, 862004, 1077505, 1259852, 1488916, 1574815, 1861145, 2155010, 3149630, 3722290, 4094519, 4310020, 6299260, 7444580, 8189038, 16378076, 20472595, 40945190, 81890380]

約数ペア:

[(1, 81890380), (2, 40945190), (4, 20472595), (5, 16378076), (10, 8189038), (11, 7444580), (13, 6299260), (19, 4310020), (20, 4094519), (22, 3722290), (26, 3149630), (38, 2155010), (44, 1861145), (52, 1574815), (55, 1488916), (65, 1259852), (76, 1077505), (95, 862004), (110, 744458), (121, 676780), (130, 629926), (137, 597740), (143, 572660), (190, 431002), (209, 391820), (220, 372229), (242, 338390), (247, 331540), (260, 314963), (274, 298870), (286, 286330), (380, 215501), (418, 195910), (484, 169195), (494, 165770), (548, 149435), (572, 143165), (605, 135356), (685, 119548), (715, 114532), (836, 97955), (988, 82885), (1045, 78364), (1210, 67678), (1235, 66308), (1370, 59774), (1430, 57266), (1507, 54340), (1573, 52060), (1781, 45980), (2090, 39182), (2299, 35620), (2420, 33839), (2470, 33154), (2603, 31460), (2717, 30140), (2740, 29887), (2860, 28633), (3014, 27170), (3146, 26030), (3562, 22990), (4180, 19591), (4598, 17810), (4940, 16577), (5206, 15730), (5434, 15070), (6028, 13585), (6292, 13015), (7124, 11495), (7535, 10868), (7865, 10412), (8905, 9196)]