21721000

素因数分解:

$2^3\times 5^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{107}}^1$

素因数の和:164

約数の個数: 128

約数和(自身を含む): 60652800

約数和(自身を除く): 38931800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 29, 35, 40, 50, 56, 58, 70, 100, 107, 116, 125, 140, 145, 175, 200, 203, 214, 232, 250, 280, 290, 350, 406, 428, 500, 535, 580, 700, 725, 749, 812, 856, 875, 1000, 1015, 1070, 1160, 1400, 1450, 1498, 1624, 1750, 2030, 2140, 2675, 2900, 2996, 3103, 3500, 3625, 3745, 4060, 4280, 5075, 5350, 5800, 5992, 6206, 7000, 7250, 7490, 8120, 10150, 10700, 12412, 13375, 14500, 14980, 15515, 18725, 20300, 21400, 21721, 24824, 25375, 26750, 29000, 29960, 31030, 37450, 40600, 43442, 50750, 53500, 62060, 74900, 77575, 86884, 93625, 101500, 107000, 108605, 124120, 149800, 155150, 173768, 187250, 203000, 217210, 310300, 374500, 387875, 434420, 543025, 620600, 749000, 775750, 868840, 1086050, 1551500, 2172100, 2715125, 3103000, 4344200, 5430250, 10860500, 21721000]

約数ペア:

[(1, 21721000), (2, 10860500), (4, 5430250), (5, 4344200), (7, 3103000), (8, 2715125), (10, 2172100), (14, 1551500), (20, 1086050), (25, 868840), (28, 775750), (29, 749000), (35, 620600), (40, 543025), (50, 434420), (56, 387875), (58, 374500), (70, 310300), (100, 217210), (107, 203000), (116, 187250), (125, 173768), (140, 155150), (145, 149800), (175, 124120), (200, 108605), (203, 107000), (214, 101500), (232, 93625), (250, 86884), (280, 77575), (290, 74900), (350, 62060), (406, 53500), (428, 50750), (500, 43442), (535, 40600), (580, 37450), (700, 31030), (725, 29960), (749, 29000), (812, 26750), (856, 25375), (875, 24824), (1000, 21721), (1015, 21400), (1070, 20300), (1160, 18725), (1400, 15515), (1450, 14980), (1498, 14500), (1624, 13375), (1750, 12412), (2030, 10700), (2140, 10150), (2675, 8120), (2900, 7490), (2996, 7250), (3103, 7000), (3500, 6206), (3625, 5992), (3745, 5800), (4060, 5350), (4280, 5075)]