81235560

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{997}}^1$

素因数の和:1115

約数の個数: 128

約数和(自身を含む): 281675520

約数和(自身を除く): 200439960

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 97, 105, 120, 140, 168, 194, 210, 280, 291, 388, 420, 485, 582, 679, 776, 840, 970, 997, 1164, 1358, 1455, 1940, 1994, 2037, 2328, 2716, 2910, 2991, 3395, 3880, 3988, 4074, 4985, 5432, 5820, 5982, 6790, 6979, 7976, 8148, 9970, 10185, 11640, 11964, 13580, 13958, 14955, 16296, 19940, 20370, 20937, 23928, 27160, 27916, 29910, 34895, 39880, 40740, 41874, 55832, 59820, 69790, 81480, 83748, 96709, 104685, 119640, 139580, 167496, 193418, 209370, 279160, 290127, 386836, 418740, 483545, 580254, 676963, 773672, 837480, 967090, 1160508, 1353926, 1450635, 1934180, 2030889, 2321016, 2707852, 2901270, 3384815, 3868360, 4061778, 5415704, 5802540, 6769630, 8123556, 10154445, 11605080, 13539260, 16247112, 20308890, 27078520, 40617780, 81235560]

約数ペア:

[(1, 81235560), (2, 40617780), (3, 27078520), (4, 20308890), (5, 16247112), (6, 13539260), (7, 11605080), (8, 10154445), (10, 8123556), (12, 6769630), (14, 5802540), (15, 5415704), (20, 4061778), (21, 3868360), (24, 3384815), (28, 2901270), (30, 2707852), (35, 2321016), (40, 2030889), (42, 1934180), (56, 1450635), (60, 1353926), (70, 1160508), (84, 967090), (97, 837480), (105, 773672), (120, 676963), (140, 580254), (168, 483545), (194, 418740), (210, 386836), (280, 290127), (291, 279160), (388, 209370), (420, 193418), (485, 167496), (582, 139580), (679, 119640), (776, 104685), (840, 96709), (970, 83748), (997, 81480), (1164, 69790), (1358, 59820), (1455, 55832), (1940, 41874), (1994, 40740), (2037, 39880), (2328, 34895), (2716, 29910), (2910, 27916), (2991, 27160), (3395, 23928), (3880, 20937), (3988, 20370), (4074, 19940), (4985, 16296), (5432, 14955), (5820, 13958), (5982, 13580), (6790, 11964), (6979, 11640), (7976, 10185), (8148, 9970)]