1800000

素因数分解:

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

素因数の和:43

約数の個数: 126

約数和(自身を含む): 6448806

約数和(自身を除く): 4648806

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25, 30, 32, 36, 40, 45, 48, 50, 60, 64, 72, 75, 80, 90, 96, 100, 120, 125, 144, 150, 160, 180, 192, 200, 225, 240, 250, 288, 300, 320, 360, 375, 400, 450, 480, 500, 576, 600, 625, 720, 750, 800, 900, 960, 1000, 1125, 1200, 1250, 1440, 1500, 1600, 1800, 1875, 2000, 2250, 2400, 2500, 2880, 3000, 3125, 3600, 3750, 4000, 4500, 4800, 5000, 5625, 6000, 6250, 7200, 7500, 8000, 9000, 9375, 10000, 11250, 12000, 12500, 14400, 15000, 18000, 18750, 20000, 22500, 24000, 25000, 28125, 30000, 36000, 37500, 40000, 45000, 50000, 56250, 60000, 72000, 75000, 90000, 100000, 112500, 120000, 150000, 180000, 200000, 225000, 300000, 360000, 450000, 600000, 900000, 1800000]

約数ペア:

[(1, 1800000), (2, 900000), (3, 600000), (4, 450000), (5, 360000), (6, 300000), (8, 225000), (9, 200000), (10, 180000), (12, 150000), (15, 120000), (16, 112500), (18, 100000), (20, 90000), (24, 75000), (25, 72000), (30, 60000), (32, 56250), (36, 50000), (40, 45000), (45, 40000), (48, 37500), (50, 36000), (60, 30000), (64, 28125), (72, 25000), (75, 24000), (80, 22500), (90, 20000), (96, 18750), (100, 18000), (120, 15000), (125, 14400), (144, 12500), (150, 12000), (160, 11250), (180, 10000), (192, 9375), (200, 9000), (225, 8000), (240, 7500), (250, 7200), (288, 6250), (300, 6000), (320, 5625), (360, 5000), (375, 4800), (400, 4500), (450, 4000), (480, 3750), (500, 3600), (576, 3125), (600, 3000), (625, 2880), (720, 2500), (750, 2400), (800, 2250), (900, 2000), (960, 1875), (1000, 1800), (1125, 1600), (1200, 1500), (1250, 1440)]