81000000

素因数分解:

$2^6\times 3^4\times 5^6$

素因数の和:54

約数の個数: 245

約数和(自身を含む): 300132877

約数和(自身を除く): 219132877

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25, 27, 30, 32, 36, 40, 45, 48, 50, 54, 60, 64, 72, 75, 80, 81, 90, 96, 100, 108, 120, 125, 135, 144, 150, 160, 162, 180, 192, 200, 216, 225, 240, 250, 270, 288, 300, 320, 324, 360, 375, 400, 405, 432, 450, 480, 500, 540, 576, 600, 625, 648, 675, 720, 750, 800, 810, 864, 900, 960, 1000, 1080, 1125, 1200, 1250, 1296, 1350, 1440, 1500, 1600, 1620, 1728, 1800, 1875, 2000, 2025, 2160, 2250, 2400, 2500, 2592, 2700, 2880, 3000, 3125, 3240, 3375, 3600, 3750, 4000, 4050, 4320, 4500, 4800, 5000, 5184, 5400, 5625, 6000, 6250, 6480, 6750, 7200, 7500, 8000, 8100, 8640, 9000, 9375, 10000, 10125, 10800, 11250, 12000, 12500, 12960, 13500, 14400, 15000, 15625, 16200, 16875, 18000, 18750, 20000, 20250, 21600, 22500, 24000, 25000, 25920, 27000, 28125, 30000, 31250, 32400, 33750, 36000, 37500, 40000, 40500, 43200, 45000, 46875, 50000, 50625, 54000, 56250, 60000, 62500, 64800, 67500, 72000, 75000, 81000, 84375, 90000, 93750, 100000, 101250, 108000, 112500, 120000, 125000, 129600, 135000, 140625, 150000, 162000, 168750, 180000, 187500, 200000, 202500, 216000, 225000, 250000, 253125, 270000, 281250, 300000, 324000, 337500, 360000, 375000, 405000, 421875, 450000, 500000, 506250, 540000, 562500, 600000, 648000, 675000, 750000, 810000, 843750, 900000, 1000000, 1012500, 1080000, 1125000, 1265625, 1350000, 1500000, 1620000, 1687500, 1800000, 2025000, 2250000, 2531250, 2700000, 3000000, 3240000, 3375000, 4050000, 4500000, 5062500, 5400000, 6750000, 8100000, 9000000, 10125000, 13500000, 16200000, 20250000, 27000000, 40500000, 81000000]

約数ペア:

[(1, 81000000), (2, 40500000), (3, 27000000), (4, 20250000), (5, 16200000), (6, 13500000), (8, 10125000), (9, 9000000), (10, 8100000), (12, 6750000), (15, 5400000), (16, 5062500), (18, 4500000), (20, 4050000), (24, 3375000), (25, 3240000), (27, 3000000), (30, 2700000), (32, 2531250), (36, 2250000), (40, 2025000), (45, 1800000), (48, 1687500), (50, 1620000), (54, 1500000), (60, 1350000), (64, 1265625), (72, 1125000), (75, 1080000), (80, 1012500), (81, 1000000), (90, 900000), (96, 843750), (100, 810000), (108, 750000), (120, 675000), (125, 648000), (135, 600000), (144, 562500), (150, 540000), (160, 506250), (162, 500000), (180, 450000), (192, 421875), (200, 405000), (216, 375000), (225, 360000), (240, 337500), (250, 324000), (270, 300000), (288, 281250), (300, 270000), (320, 253125), (324, 250000), (360, 225000), (375, 216000), (400, 202500), (405, 200000), (432, 187500), (450, 180000), (480, 168750), (500, 162000), (540, 150000), (576, 140625), (600, 135000), (625, 129600), (648, 125000), (675, 120000), (720, 112500), (750, 108000), (800, 101250), (810, 100000), (864, 93750), (900, 90000), (960, 84375), (1000, 81000), (1080, 75000), (1125, 72000), (1200, 67500), (1250, 64800), (1296, 62500), (1350, 60000), (1440, 56250), (1500, 54000), (1600, 50625), (1620, 50000), (1728, 46875), (1800, 45000), (1875, 43200), (2000, 40500), (2025, 40000), (2160, 37500), (2250, 36000), (2400, 33750), (2500, 32400), (2592, 31250), (2700, 30000), (2880, 28125), (3000, 27000), (3125, 25920), (3240, 25000), (3375, 24000), (3600, 22500), (3750, 21600), (4000, 20250), (4050, 20000), (4320, 18750), (4500, 18000), (4800, 16875), (5000, 16200), (5184, 15625), (5400, 15000), (5625, 14400), (6000, 13500), (6250, 12960), (6480, 12500), (6750, 12000), (7200, 11250), (7500, 10800), (8000, 10125), (8100, 10000), (8640, 9375)]