21000810896

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{263}}^1\times {\mathrm{397}}^1\times {\mathrm{967}}^1$

素因数の和:1648

約数の個数: 80

約数和(自身を含む): 44142008064

約数和(自身を除く): 23141197168

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 263, 397, 526, 794, 967, 1052, 1588, 1934, 2104, 3176, 3419, 3868, 4208, 5161, 6352, 6838, 7736, 10322, 12571, 13676, 15472, 20644, 25142, 27352, 41288, 50284, 54704, 82576, 100568, 104411, 201136, 208822, 254321, 383899, 417644, 508642, 767798, 835288, 1017284, 1357343, 1535596, 1670576, 2034568, 2714686, 3071192, 3306173, 4069136, 4990687, 5429372, 6142384, 6612346, 9981374, 10858744, 13224692, 19962748, 21717488, 26449384, 39925496, 52898768, 79850992, 100965437, 201930874, 403861748, 807723496, 1312550681, 1615446992, 2625101362, 5250202724, 10500405448, 21000810896]

約数ペア:

[(1, 21000810896), (2, 10500405448), (4, 5250202724), (8, 2625101362), (13, 1615446992), (16, 1312550681), (26, 807723496), (52, 403861748), (104, 201930874), (208, 100965437), (263, 79850992), (397, 52898768), (526, 39925496), (794, 26449384), (967, 21717488), (1052, 19962748), (1588, 13224692), (1934, 10858744), (2104, 9981374), (3176, 6612346), (3419, 6142384), (3868, 5429372), (4208, 4990687), (5161, 4069136), (6352, 3306173), (6838, 3071192), (7736, 2714686), (10322, 2034568), (12571, 1670576), (13676, 1535596), (15472, 1357343), (20644, 1017284), (25142, 835288), (27352, 767798), (41288, 508642), (50284, 417644), (54704, 383899), (82576, 254321), (100568, 208822), (104411, 201136)]