20981100

素因数分解:

$2^2\times 3^1\times 5^2\times 7^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:224

約数の個数: 144

約数和(自身を含む): 70773248

約数和(自身を除く): 49792148

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 25, 28, 30, 35, 42, 50, 60, 70, 75, 84, 97, 100, 103, 105, 140, 150, 175, 194, 206, 210, 291, 300, 309, 350, 388, 412, 420, 485, 515, 525, 582, 618, 679, 700, 721, 970, 1030, 1050, 1164, 1236, 1358, 1442, 1455, 1545, 1940, 2037, 2060, 2100, 2163, 2425, 2575, 2716, 2884, 2910, 3090, 3395, 3605, 4074, 4326, 4850, 5150, 5820, 6180, 6790, 7210, 7275, 7725, 8148, 8652, 9700, 9991, 10185, 10300, 10815, 13580, 14420, 14550, 15450, 16975, 18025, 19982, 20370, 21630, 29100, 29973, 30900, 33950, 36050, 39964, 40740, 43260, 49955, 50925, 54075, 59946, 67900, 69937, 72100, 99910, 101850, 108150, 119892, 139874, 149865, 199820, 203700, 209811, 216300, 249775, 279748, 299730, 349685, 419622, 499550, 599460, 699370, 749325, 839244, 999100, 1049055, 1398740, 1498650, 1748425, 2098110, 2997300, 3496850, 4196220, 5245275, 6993700, 10490550, 20981100]

約数ペア:

[(1, 20981100), (2, 10490550), (3, 6993700), (4, 5245275), (5, 4196220), (6, 3496850), (7, 2997300), (10, 2098110), (12, 1748425), (14, 1498650), (15, 1398740), (20, 1049055), (21, 999100), (25, 839244), (28, 749325), (30, 699370), (35, 599460), (42, 499550), (50, 419622), (60, 349685), (70, 299730), (75, 279748), (84, 249775), (97, 216300), (100, 209811), (103, 203700), (105, 199820), (140, 149865), (150, 139874), (175, 119892), (194, 108150), (206, 101850), (210, 99910), (291, 72100), (300, 69937), (309, 67900), (350, 59946), (388, 54075), (412, 50925), (420, 49955), (485, 43260), (515, 40740), (525, 39964), (582, 36050), (618, 33950), (679, 30900), (700, 29973), (721, 29100), (970, 21630), (1030, 20370), (1050, 19982), (1164, 18025), (1236, 16975), (1358, 15450), (1442, 14550), (1455, 14420), (1545, 13580), (1940, 10815), (2037, 10300), (2060, 10185), (2100, 9991), (2163, 9700), (2425, 8652), (2575, 8148), (2716, 7725), (2884, 7275), (2910, 7210), (3090, 6790), (3395, 6180), (3605, 5820), (4074, 5150), (4326, 4850)]