18900000

素因数分解:

$2^5\times 3^3\times 5^5\times 7^1$

素因数の和:51

約数の個数: 288

約数和(自身を含む): 78744960

約数和(自身を除く): 59844960

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 25, 27, 28, 30, 32, 35, 36, 40, 42, 45, 48, 50, 54, 56, 60, 63, 70, 72, 75, 80, 84, 90, 96, 100, 105, 108, 112, 120, 125, 126, 135, 140, 144, 150, 160, 168, 175, 180, 189, 200, 210, 216, 224, 225, 240, 250, 252, 270, 280, 288, 300, 315, 336, 350, 360, 375, 378, 400, 420, 432, 450, 480, 500, 504, 525, 540, 560, 600, 625, 630, 672, 675, 700, 720, 750, 756, 800, 840, 864, 875, 900, 945, 1000, 1008, 1050, 1080, 1120, 1125, 1200, 1250, 1260, 1350, 1400, 1440, 1500, 1512, 1575, 1680, 1750, 1800, 1875, 1890, 2000, 2016, 2100, 2160, 2250, 2400, 2500, 2520, 2625, 2700, 2800, 3000, 3024, 3125, 3150, 3360, 3375, 3500, 3600, 3750, 3780, 4000, 4200, 4320, 4375, 4500, 4725, 5000, 5040, 5250, 5400, 5600, 5625, 6000, 6048, 6250, 6300, 6750, 7000, 7200, 7500, 7560, 7875, 8400, 8750, 9000, 9375, 9450, 10000, 10080, 10500, 10800, 11250, 12000, 12500, 12600, 13125, 13500, 14000, 15000, 15120, 15750, 16800, 16875, 17500, 18000, 18750, 18900, 20000, 21000, 21600, 21875, 22500, 23625, 25000, 25200, 26250, 27000, 28000, 28125, 30000, 30240, 31500, 33750, 35000, 36000, 37500, 37800, 39375, 42000, 43750, 45000, 47250, 50000, 50400, 52500, 54000, 56250, 60000, 63000, 65625, 67500, 70000, 75000, 75600, 78750, 84000, 84375, 87500, 90000, 94500, 100000, 105000, 108000, 112500, 118125, 126000, 131250, 135000, 140000, 150000, 151200, 157500, 168750, 175000, 180000, 189000, 196875, 210000, 225000, 236250, 252000, 262500, 270000, 300000, 315000, 337500, 350000, 378000, 393750, 420000, 450000, 472500, 525000, 540000, 590625, 630000, 675000, 700000, 756000, 787500, 900000, 945000, 1050000, 1181250, 1260000, 1350000, 1575000, 1890000, 2100000, 2362500, 2700000, 3150000, 3780000, 4725000, 6300000, 9450000, 18900000]

約数ペア:

[(1, 18900000), (2, 9450000), (3, 6300000), (4, 4725000), (5, 3780000), (6, 3150000), (7, 2700000), (8, 2362500), (9, 2100000), (10, 1890000), (12, 1575000), (14, 1350000), (15, 1260000), (16, 1181250), (18, 1050000), (20, 945000), (21, 900000), (24, 787500), (25, 756000), (27, 700000), (28, 675000), (30, 630000), (32, 590625), (35, 540000), (36, 525000), (40, 472500), (42, 450000), (45, 420000), (48, 393750), (50, 378000), (54, 350000), (56, 337500), (60, 315000), (63, 300000), (70, 270000), (72, 262500), (75, 252000), (80, 236250), (84, 225000), (90, 210000), (96, 196875), (100, 189000), (105, 180000), (108, 175000), (112, 168750), (120, 157500), (125, 151200), (126, 150000), (135, 140000), (140, 135000), (144, 131250), (150, 126000), (160, 118125), (168, 112500), (175, 108000), (180, 105000), (189, 100000), (200, 94500), (210, 90000), (216, 87500), (224, 84375), (225, 84000), (240, 78750), (250, 75600), (252, 75000), (270, 70000), (280, 67500), (288, 65625), (300, 63000), (315, 60000), (336, 56250), (350, 54000), (360, 52500), (375, 50400), (378, 50000), (400, 47250), (420, 45000), (432, 43750), (450, 42000), (480, 39375), (500, 37800), (504, 37500), (525, 36000), (540, 35000), (560, 33750), (600, 31500), (625, 30240), (630, 30000), (672, 28125), (675, 28000), (700, 27000), (720, 26250), (750, 25200), (756, 25000), (800, 23625), (840, 22500), (864, 21875), (875, 21600), (900, 21000), (945, 20000), (1000, 18900), (1008, 18750), (1050, 18000), (1080, 17500), (1120, 16875), (1125, 16800), (1200, 15750), (1250, 15120), (1260, 15000), (1350, 14000), (1400, 13500), (1440, 13125), (1500, 12600), (1512, 12500), (1575, 12000), (1680, 11250), (1750, 10800), (1800, 10500), (1875, 10080), (1890, 10000), (2000, 9450), (2016, 9375), (2100, 9000), (2160, 8750), (2250, 8400), (2400, 7875), (2500, 7560), (2520, 7500), (2625, 7200), (2700, 7000), (2800, 6750), (3000, 6300), (3024, 6250), (3125, 6048), (3150, 6000), (3360, 5625), (3375, 5600), (3500, 5400), (3600, 5250), (3750, 5040), (3780, 5000), (4000, 4725), (4200, 4500), (4320, 4375)]