81439260

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{1999}}^1$

素因数の和:2115

約数の個数: 96

約数和(自身を含む): 263424000

約数和(自身を除く): 181984740

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, 1999, 2037, 2716, 2910, 3395, 3998, 4074, 5820, 5997, 6790, 7996, 8148, 9995, 10185, 11994, 13580, 13993, 19990, 20370, 23988, 27986, 29985, 39980, 40740, 41979, 55972, 59970, 69965, 83958, 119940, 139930, 167916, 193903, 209895, 279860, 387806, 419790, 581709, 775612, 839580, 969515, 1163418, 1357321, 1939030, 2326836, 2714642, 2908545, 3878060, 4071963, 5429284, 5817090, 6786605, 8143926, 11634180, 13573210, 16287852, 20359815, 27146420, 40719630, 81439260]

約数ペア:

[(1, 81439260), (2, 40719630), (3, 27146420), (4, 20359815), (5, 16287852), (6, 13573210), (7, 11634180), (10, 8143926), (12, 6786605), (14, 5817090), (15, 5429284), (20, 4071963), (21, 3878060), (28, 2908545), (30, 2714642), (35, 2326836), (42, 1939030), (60, 1357321), (70, 1163418), (84, 969515), (97, 839580), (105, 775612), (140, 581709), (194, 419790), (210, 387806), (291, 279860), (388, 209895), (420, 193903), (485, 167916), (582, 139930), (679, 119940), (970, 83958), (1164, 69965), (1358, 59970), (1455, 55972), (1940, 41979), (1999, 40740), (2037, 39980), (2716, 29985), (2910, 27986), (3395, 23988), (3998, 20370), (4074, 19990), (5820, 13993), (5997, 13580), (6790, 11994), (7996, 10185), (8148, 9995)]