2100000

素因数分解:

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

素因数の和:45

約数の個数: 144

約数和(自身を含む): 7874496

約数和(自身を除く): 5774496

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 25, 28, 30, 32, 35, 40, 42, 48, 50, 56, 60, 70, 75, 80, 84, 96, 100, 105, 112, 120, 125, 140, 150, 160, 168, 175, 200, 210, 224, 240, 250, 280, 300, 336, 350, 375, 400, 420, 480, 500, 525, 560, 600, 625, 672, 700, 750, 800, 840, 875, 1000, 1050, 1120, 1200, 1250, 1400, 1500, 1680, 1750, 1875, 2000, 2100, 2400, 2500, 2625, 2800, 3000, 3125, 3360, 3500, 3750, 4000, 4200, 4375, 5000, 5250, 5600, 6000, 6250, 7000, 7500, 8400, 8750, 9375, 10000, 10500, 12000, 12500, 13125, 14000, 15000, 16800, 17500, 18750, 20000, 21000, 21875, 25000, 26250, 28000, 30000, 35000, 37500, 42000, 43750, 50000, 52500, 60000, 65625, 70000, 75000, 84000, 87500, 100000, 105000, 131250, 140000, 150000, 175000, 210000, 262500, 300000, 350000, 420000, 525000, 700000, 1050000, 2100000]

約数ペア:

[(1, 2100000), (2, 1050000), (3, 700000), (4, 525000), (5, 420000), (6, 350000), (7, 300000), (8, 262500), (10, 210000), (12, 175000), (14, 150000), (15, 140000), (16, 131250), (20, 105000), (21, 100000), (24, 87500), (25, 84000), (28, 75000), (30, 70000), (32, 65625), (35, 60000), (40, 52500), (42, 50000), (48, 43750), (50, 42000), (56, 37500), (60, 35000), (70, 30000), (75, 28000), (80, 26250), (84, 25000), (96, 21875), (100, 21000), (105, 20000), (112, 18750), (120, 17500), (125, 16800), (140, 15000), (150, 14000), (160, 13125), (168, 12500), (175, 12000), (200, 10500), (210, 10000), (224, 9375), (240, 8750), (250, 8400), (280, 7500), (300, 7000), (336, 6250), (350, 6000), (375, 5600), (400, 5250), (420, 5000), (480, 4375), (500, 4200), (525, 4000), (560, 3750), (600, 3500), (625, 3360), (672, 3125), (700, 3000), (750, 2800), (800, 2625), (840, 2500), (875, 2400), (1000, 2100), (1050, 2000), (1120, 1875), (1200, 1750), (1250, 1680), (1400, 1500)]