18720000

素因数分解:

$2^8\times 3^2\times 5^4\times {\mathrm{13}}^1$

素因数の和:55

約数の個数: 270

約数和(自身を含む): 72634562

約数和(自身を除く): 53914562

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 18, 20, 24, 25, 26, 30, 32, 36, 39, 40, 45, 48, 50, 52, 60, 64, 65, 72, 75, 78, 80, 90, 96, 100, 104, 117, 120, 125, 128, 130, 144, 150, 156, 160, 180, 192, 195, 200, 208, 225, 234, 240, 250, 256, 260, 288, 300, 312, 320, 325, 360, 375, 384, 390, 400, 416, 450, 468, 480, 500, 520, 576, 585, 600, 624, 625, 640, 650, 720, 750, 768, 780, 800, 832, 900, 936, 960, 975, 1000, 1040, 1125, 1152, 1170, 1200, 1248, 1250, 1280, 1300, 1440, 1500, 1560, 1600, 1625, 1664, 1800, 1872, 1875, 1920, 1950, 2000, 2080, 2250, 2304, 2340, 2400, 2496, 2500, 2600, 2880, 2925, 3000, 3120, 3200, 3250, 3328, 3600, 3744, 3750, 3840, 3900, 4000, 4160, 4500, 4680, 4800, 4875, 4992, 5000, 5200, 5625, 5760, 5850, 6000, 6240, 6400, 6500, 7200, 7488, 7500, 7800, 8000, 8125, 8320, 9000, 9360, 9600, 9750, 9984, 10000, 10400, 11250, 11520, 11700, 12000, 12480, 13000, 14400, 14625, 14976, 15000, 15600, 16000, 16250, 16640, 18000, 18720, 19200, 19500, 20000, 20800, 22500, 23400, 24000, 24375, 24960, 26000, 28800, 29250, 29952, 30000, 31200, 32000, 32500, 36000, 37440, 39000, 40000, 41600, 45000, 46800, 48000, 48750, 49920, 52000, 57600, 58500, 60000, 62400, 65000, 72000, 73125, 74880, 78000, 80000, 83200, 90000, 93600, 96000, 97500, 104000, 117000, 120000, 124800, 130000, 144000, 146250, 149760, 156000, 160000, 180000, 187200, 195000, 208000, 234000, 240000, 249600, 260000, 288000, 292500, 312000, 360000, 374400, 390000, 416000, 468000, 480000, 520000, 585000, 624000, 720000, 748800, 780000, 936000, 1040000, 1170000, 1248000, 1440000, 1560000, 1872000, 2080000, 2340000, 3120000, 3744000, 4680000, 6240000, 9360000, 18720000]

約数ペア:

[(1, 18720000), (2, 9360000), (3, 6240000), (4, 4680000), (5, 3744000), (6, 3120000), (8, 2340000), (9, 2080000), (10, 1872000), (12, 1560000), (13, 1440000), (15, 1248000), (16, 1170000), (18, 1040000), (20, 936000), (24, 780000), (25, 748800), (26, 720000), (30, 624000), (32, 585000), (36, 520000), (39, 480000), (40, 468000), (45, 416000), (48, 390000), (50, 374400), (52, 360000), (60, 312000), (64, 292500), (65, 288000), (72, 260000), (75, 249600), (78, 240000), (80, 234000), (90, 208000), (96, 195000), (100, 187200), (104, 180000), (117, 160000), (120, 156000), (125, 149760), (128, 146250), (130, 144000), (144, 130000), (150, 124800), (156, 120000), (160, 117000), (180, 104000), (192, 97500), (195, 96000), (200, 93600), (208, 90000), (225, 83200), (234, 80000), (240, 78000), (250, 74880), (256, 73125), (260, 72000), (288, 65000), (300, 62400), (312, 60000), (320, 58500), (325, 57600), (360, 52000), (375, 49920), (384, 48750), (390, 48000), (400, 46800), (416, 45000), (450, 41600), (468, 40000), (480, 39000), (500, 37440), (520, 36000), (576, 32500), (585, 32000), (600, 31200), (624, 30000), (625, 29952), (640, 29250), (650, 28800), (720, 26000), (750, 24960), (768, 24375), (780, 24000), (800, 23400), (832, 22500), (900, 20800), (936, 20000), (960, 19500), (975, 19200), (1000, 18720), (1040, 18000), (1125, 16640), (1152, 16250), (1170, 16000), (1200, 15600), (1248, 15000), (1250, 14976), (1280, 14625), (1300, 14400), (1440, 13000), (1500, 12480), (1560, 12000), (1600, 11700), (1625, 11520), (1664, 11250), (1800, 10400), (1872, 10000), (1875, 9984), (1920, 9750), (1950, 9600), (2000, 9360), (2080, 9000), (2250, 8320), (2304, 8125), (2340, 8000), (2400, 7800), (2496, 7500), (2500, 7488), (2600, 7200), (2880, 6500), (2925, 6400), (3000, 6240), (3120, 6000), (3200, 5850), (3250, 5760), (3328, 5625), (3600, 5200), (3744, 5000), (3750, 4992), (3840, 4875), (3900, 4800), (4000, 4680), (4160, 4500)]