81357780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{1997}}^1$

素因数の和:2113

約数の個数: 96

約数和(自身を含む): 263160576

約数和(自身を除く): 181802796

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 97, 105, 140, 194, 210, 291, 388, 420, 485, 582, 679, 970, 1164, 1358, 1455, 1940, 1997, 2037, 2716, 2910, 3395, 3994, 4074, 5820, 5991, 6790, 7988, 8148, 9985, 10185, 11982, 13580, 13979, 19970, 20370, 23964, 27958, 29955, 39940, 40740, 41937, 55916, 59910, 69895, 83874, 119820, 139790, 167748, 193709, 209685, 279580, 387418, 419370, 581127, 774836, 838740, 968545, 1162254, 1355963, 1937090, 2324508, 2711926, 2905635, 3874180, 4067889, 5423852, 5811270, 6779815, 8135778, 11622540, 13559630, 16271556, 20339445, 27119260, 40678890, 81357780]

約数ペア:

[(1, 81357780), (2, 40678890), (3, 27119260), (4, 20339445), (5, 16271556), (6, 13559630), (7, 11622540), (10, 8135778), (12, 6779815), (14, 5811270), (15, 5423852), (20, 4067889), (21, 3874180), (28, 2905635), (30, 2711926), (35, 2324508), (42, 1937090), (60, 1355963), (70, 1162254), (84, 968545), (97, 838740), (105, 774836), (140, 581127), (194, 419370), (210, 387418), (291, 279580), (388, 209685), (420, 193709), (485, 167748), (582, 139790), (679, 119820), (970, 83874), (1164, 69895), (1358, 59910), (1455, 55916), (1940, 41937), (1997, 40740), (2037, 39940), (2716, 29955), (2910, 27958), (3395, 23964), (3994, 20370), (4074, 19970), (5820, 13979), (5991, 13580), (6790, 11982), (7988, 10185), (8148, 9985)]