20128500

素因数分解:

$2^2\times 3^4\times 5^3\times 7^1\times {\mathrm{71}}^1$

素因数の和:109

約数の個数: 240

約数和(自身を含む): 76108032

約数和(自身を除く): 55979532

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 25, 27, 28, 30, 35, 36, 42, 45, 50, 54, 60, 63, 70, 71, 75, 81, 84, 90, 100, 105, 108, 125, 126, 135, 140, 142, 150, 162, 175, 180, 189, 210, 213, 225, 250, 252, 270, 284, 300, 315, 324, 350, 355, 375, 378, 405, 420, 426, 450, 497, 500, 525, 540, 567, 630, 639, 675, 700, 710, 750, 756, 810, 852, 875, 900, 945, 994, 1050, 1065, 1125, 1134, 1260, 1278, 1350, 1420, 1491, 1500, 1575, 1620, 1750, 1775, 1890, 1917, 1988, 2025, 2100, 2130, 2250, 2268, 2485, 2556, 2625, 2700, 2835, 2982, 3150, 3195, 3375, 3500, 3550, 3780, 3834, 4050, 4260, 4473, 4500, 4725, 4970, 5250, 5325, 5670, 5751, 5964, 6300, 6390, 6750, 7100, 7455, 7668, 7875, 8100, 8875, 8946, 9450, 9585, 9940, 10125, 10500, 10650, 11340, 11502, 12425, 12780, 13419, 13500, 14175, 14910, 15750, 15975, 17750, 17892, 18900, 19170, 20250, 21300, 22365, 23004, 23625, 24850, 26625, 26838, 28350, 28755, 29820, 31500, 31950, 35500, 37275, 38340, 40257, 40500, 44730, 47250, 47925, 49700, 53250, 53676, 56700, 57510, 62125, 63900, 67095, 70875, 74550, 79875, 80514, 89460, 94500, 95850, 106500, 111825, 115020, 124250, 134190, 141750, 143775, 149100, 159750, 161028, 186375, 191700, 201285, 223650, 239625, 248500, 268380, 283500, 287550, 319500, 335475, 372750, 402570, 447300, 479250, 559125, 575100, 670950, 718875, 745500, 805140, 958500, 1006425, 1118250, 1341900, 1437750, 1677375, 2012850, 2236500, 2875500, 3354750, 4025700, 5032125, 6709500, 10064250, 20128500]

約数ペア:

[(1, 20128500), (2, 10064250), (3, 6709500), (4, 5032125), (5, 4025700), (6, 3354750), (7, 2875500), (9, 2236500), (10, 2012850), (12, 1677375), (14, 1437750), (15, 1341900), (18, 1118250), (20, 1006425), (21, 958500), (25, 805140), (27, 745500), (28, 718875), (30, 670950), (35, 575100), (36, 559125), (42, 479250), (45, 447300), (50, 402570), (54, 372750), (60, 335475), (63, 319500), (70, 287550), (71, 283500), (75, 268380), (81, 248500), (84, 239625), (90, 223650), (100, 201285), (105, 191700), (108, 186375), (125, 161028), (126, 159750), (135, 149100), (140, 143775), (142, 141750), (150, 134190), (162, 124250), (175, 115020), (180, 111825), (189, 106500), (210, 95850), (213, 94500), (225, 89460), (250, 80514), (252, 79875), (270, 74550), (284, 70875), (300, 67095), (315, 63900), (324, 62125), (350, 57510), (355, 56700), (375, 53676), (378, 53250), (405, 49700), (420, 47925), (426, 47250), (450, 44730), (497, 40500), (500, 40257), (525, 38340), (540, 37275), (567, 35500), (630, 31950), (639, 31500), (675, 29820), (700, 28755), (710, 28350), (750, 26838), (756, 26625), (810, 24850), (852, 23625), (875, 23004), (900, 22365), (945, 21300), (994, 20250), (1050, 19170), (1065, 18900), (1125, 17892), (1134, 17750), (1260, 15975), (1278, 15750), (1350, 14910), (1420, 14175), (1491, 13500), (1500, 13419), (1575, 12780), (1620, 12425), (1750, 11502), (1775, 11340), (1890, 10650), (1917, 10500), (1988, 10125), (2025, 9940), (2100, 9585), (2130, 9450), (2250, 8946), (2268, 8875), (2485, 8100), (2556, 7875), (2625, 7668), (2700, 7455), (2835, 7100), (2982, 6750), (3150, 6390), (3195, 6300), (3375, 5964), (3500, 5751), (3550, 5670), (3780, 5325), (3834, 5250), (4050, 4970), (4260, 4725), (4473, 4500)]