420000000

素因数分解:

$2^8\times 3^1\times 5^7\times 7^1$

素因数の和:61

約数の個数: 288

約数和(自身を含む): 1596870912

約数和(自身を除く): 1176870912

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, 64, 70, 75, 80, 84, 96, 100, 105, 112, 120, 125, 128, 140, 150, 160, 168, 175, 192, 200, 210, 224, 240, 250, 256, 280, 300, 320, 336, 350, 375, 384, 400, 420, 448, 480, 500, 525, 560, 600, 625, 640, 672, 700, 750, 768, 800, 840, 875, 896, 960, 1000, 1050, 1120, 1200, 1250, 1280, 1344, 1400, 1500, 1600, 1680, 1750, 1792, 1875, 1920, 2000, 2100, 2240, 2400, 2500, 2625, 2688, 2800, 3000, 3125, 3200, 3360, 3500, 3750, 3840, 4000, 4200, 4375, 4480, 4800, 5000, 5250, 5376, 5600, 6000, 6250, 6400, 6720, 7000, 7500, 8000, 8400, 8750, 8960, 9375, 9600, 10000, 10500, 11200, 12000, 12500, 13125, 13440, 14000, 15000, 15625, 16000, 16800, 17500, 18750, 19200, 20000, 21000, 21875, 22400, 24000, 25000, 26250, 26880, 28000, 30000, 31250, 32000, 33600, 35000, 37500, 40000, 42000, 43750, 44800, 46875, 48000, 50000, 52500, 56000, 60000, 62500, 65625, 67200, 70000, 75000, 78125, 80000, 84000, 87500, 93750, 96000, 100000, 105000, 109375, 112000, 120000, 125000, 131250, 134400, 140000, 150000, 156250, 160000, 168000, 175000, 187500, 200000, 210000, 218750, 224000, 234375, 240000, 250000, 262500, 280000, 300000, 312500, 328125, 336000, 350000, 375000, 400000, 420000, 437500, 468750, 480000, 500000, 525000, 546875, 560000, 600000, 625000, 656250, 672000, 700000, 750000, 800000, 840000, 875000, 937500, 1000000, 1050000, 1093750, 1120000, 1200000, 1250000, 1312500, 1400000, 1500000, 1640625, 1680000, 1750000, 1875000, 2000000, 2100000, 2187500, 2400000, 2500000, 2625000, 2800000, 3000000, 3281250, 3360000, 3500000, 3750000, 4000000, 4200000, 4375000, 5000000, 5250000, 5600000, 6000000, 6562500, 7000000, 7500000, 8400000, 8750000, 10000000, 10500000, 12000000, 13125000, 14000000, 15000000, 16800000, 17500000, 20000000, 21000000, 26250000, 28000000, 30000000, 35000000, 42000000, 52500000, 60000000, 70000000, 84000000, 105000000, 140000000, 210000000, 420000000]

約数ペア:

[(1, 420000000), (2, 210000000), (3, 140000000), (4, 105000000), (5, 84000000), (6, 70000000), (7, 60000000), (8, 52500000), (10, 42000000), (12, 35000000), (14, 30000000), (15, 28000000), (16, 26250000), (20, 21000000), (21, 20000000), (24, 17500000), (25, 16800000), (28, 15000000), (30, 14000000), (32, 13125000), (35, 12000000), (40, 10500000), (42, 10000000), (48, 8750000), (50, 8400000), (56, 7500000), (60, 7000000), (64, 6562500), (70, 6000000), (75, 5600000), (80, 5250000), (84, 5000000), (96, 4375000), (100, 4200000), (105, 4000000), (112, 3750000), (120, 3500000), (125, 3360000), (128, 3281250), (140, 3000000), (150, 2800000), (160, 2625000), (168, 2500000), (175, 2400000), (192, 2187500), (200, 2100000), (210, 2000000), (224, 1875000), (240, 1750000), (250, 1680000), (256, 1640625), (280, 1500000), (300, 1400000), (320, 1312500), (336, 1250000), (350, 1200000), (375, 1120000), (384, 1093750), (400, 1050000), (420, 1000000), (448, 937500), (480, 875000), (500, 840000), (525, 800000), (560, 750000), (600, 700000), (625, 672000), (640, 656250), (672, 625000), (700, 600000), (750, 560000), (768, 546875), (800, 525000), (840, 500000), (875, 480000), (896, 468750), (960, 437500), (1000, 420000), (1050, 400000), (1120, 375000), (1200, 350000), (1250, 336000), (1280, 328125), (1344, 312500), (1400, 300000), (1500, 280000), (1600, 262500), (1680, 250000), (1750, 240000), (1792, 234375), (1875, 224000), (1920, 218750), (2000, 210000), (2100, 200000), (2240, 187500), (2400, 175000), (2500, 168000), (2625, 160000), (2688, 156250), (2800, 150000), (3000, 140000), (3125, 134400), (3200, 131250), (3360, 125000), (3500, 120000), (3750, 112000), (3840, 109375), (4000, 105000), (4200, 100000), (4375, 96000), (4480, 93750), (4800, 87500), (5000, 84000), (5250, 80000), (5376, 78125), (5600, 75000), (6000, 70000), (6250, 67200), (6400, 65625), (6720, 62500), (7000, 60000), (7500, 56000), (8000, 52500), (8400, 50000), (8750, 48000), (8960, 46875), (9375, 44800), (9600, 43750), (10000, 42000), (10500, 40000), (11200, 37500), (12000, 35000), (12500, 33600), (13125, 32000), (13440, 31250), (14000, 30000), (15000, 28000), (15625, 26880), (16000, 26250), (16800, 25000), (17500, 24000), (18750, 22400), (19200, 21875), (20000, 21000)]