20880000

素因数分解:

$2^7\times 3^2\times 5^4\times {\mathrm{29}}^1$

素因数の和:69

約数の個数: 240

約数和(自身を含む): 77670450

約数和(自身を除く): 56790450

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25, 29, 30, 32, 36, 40, 45, 48, 50, 58, 60, 64, 72, 75, 80, 87, 90, 96, 100, 116, 120, 125, 128, 144, 145, 150, 160, 174, 180, 192, 200, 225, 232, 240, 250, 261, 288, 290, 300, 320, 348, 360, 375, 384, 400, 435, 450, 464, 480, 500, 522, 576, 580, 600, 625, 640, 696, 720, 725, 750, 800, 870, 900, 928, 960, 1000, 1044, 1125, 1152, 1160, 1200, 1250, 1305, 1392, 1440, 1450, 1500, 1600, 1740, 1800, 1856, 1875, 1920, 2000, 2088, 2175, 2250, 2320, 2400, 2500, 2610, 2784, 2880, 2900, 3000, 3200, 3480, 3600, 3625, 3712, 3750, 4000, 4176, 4350, 4500, 4640, 4800, 5000, 5220, 5568, 5625, 5760, 5800, 6000, 6525, 6960, 7200, 7250, 7500, 8000, 8352, 8700, 9000, 9280, 9600, 10000, 10440, 10875, 11136, 11250, 11600, 12000, 13050, 13920, 14400, 14500, 15000, 16000, 16704, 17400, 18000, 18125, 18560, 20000, 20880, 21750, 22500, 23200, 24000, 26100, 27840, 28800, 29000, 30000, 32625, 33408, 34800, 36000, 36250, 40000, 41760, 43500, 45000, 46400, 48000, 52200, 54375, 55680, 58000, 60000, 65250, 69600, 72000, 72500, 80000, 83520, 87000, 90000, 92800, 104400, 108750, 116000, 120000, 130500, 139200, 144000, 145000, 163125, 167040, 174000, 180000, 208800, 217500, 232000, 240000, 261000, 278400, 290000, 326250, 348000, 360000, 417600, 435000, 464000, 522000, 580000, 652500, 696000, 720000, 835200, 870000, 1044000, 1160000, 1305000, 1392000, 1740000, 2088000, 2320000, 2610000, 3480000, 4176000, 5220000, 6960000, 10440000, 20880000]

約数ペア:

[(1, 20880000), (2, 10440000), (3, 6960000), (4, 5220000), (5, 4176000), (6, 3480000), (8, 2610000), (9, 2320000), (10, 2088000), (12, 1740000), (15, 1392000), (16, 1305000), (18, 1160000), (20, 1044000), (24, 870000), (25, 835200), (29, 720000), (30, 696000), (32, 652500), (36, 580000), (40, 522000), (45, 464000), (48, 435000), (50, 417600), (58, 360000), (60, 348000), (64, 326250), (72, 290000), (75, 278400), (80, 261000), (87, 240000), (90, 232000), (96, 217500), (100, 208800), (116, 180000), (120, 174000), (125, 167040), (128, 163125), (144, 145000), (145, 144000), (150, 139200), (160, 130500), (174, 120000), (180, 116000), (192, 108750), (200, 104400), (225, 92800), (232, 90000), (240, 87000), (250, 83520), (261, 80000), (288, 72500), (290, 72000), (300, 69600), (320, 65250), (348, 60000), (360, 58000), (375, 55680), (384, 54375), (400, 52200), (435, 48000), (450, 46400), (464, 45000), (480, 43500), (500, 41760), (522, 40000), (576, 36250), (580, 36000), (600, 34800), (625, 33408), (640, 32625), (696, 30000), (720, 29000), (725, 28800), (750, 27840), (800, 26100), (870, 24000), (900, 23200), (928, 22500), (960, 21750), (1000, 20880), (1044, 20000), (1125, 18560), (1152, 18125), (1160, 18000), (1200, 17400), (1250, 16704), (1305, 16000), (1392, 15000), (1440, 14500), (1450, 14400), (1500, 13920), (1600, 13050), (1740, 12000), (1800, 11600), (1856, 11250), (1875, 11136), (1920, 10875), (2000, 10440), (2088, 10000), (2175, 9600), (2250, 9280), (2320, 9000), (2400, 8700), (2500, 8352), (2610, 8000), (2784, 7500), (2880, 7250), (2900, 7200), (3000, 6960), (3200, 6525), (3480, 6000), (3600, 5800), (3625, 5760), (3712, 5625), (3750, 5568), (4000, 5220), (4176, 5000), (4350, 4800), (4500, 4640)]