21070000

素因数分解:

$2^4\times 5^4\times 7^2\times {\mathrm{43}}^1$

素因数の和:85

約数の個数: 150

約数和(自身を含む): 60721188

約数和(自身を除く): 39651188

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 35, 40, 43, 49, 50, 56, 70, 80, 86, 98, 100, 112, 125, 140, 172, 175, 196, 200, 215, 245, 250, 280, 301, 344, 350, 392, 400, 430, 490, 500, 560, 602, 625, 688, 700, 784, 860, 875, 980, 1000, 1075, 1204, 1225, 1250, 1400, 1505, 1720, 1750, 1960, 2000, 2107, 2150, 2408, 2450, 2500, 2800, 3010, 3440, 3500, 3920, 4214, 4300, 4375, 4816, 4900, 5000, 5375, 6020, 6125, 7000, 7525, 8428, 8600, 8750, 9800, 10000, 10535, 10750, 12040, 12250, 14000, 15050, 16856, 17200, 17500, 19600, 21070, 21500, 24080, 24500, 26875, 30100, 30625, 33712, 35000, 37625, 42140, 43000, 49000, 52675, 53750, 60200, 61250, 70000, 75250, 84280, 86000, 98000, 105350, 107500, 120400, 122500, 150500, 168560, 188125, 210700, 215000, 245000, 263375, 301000, 376250, 421400, 430000, 490000, 526750, 602000, 752500, 842800, 1053500, 1316875, 1505000, 2107000, 2633750, 3010000, 4214000, 5267500, 10535000, 21070000]

約数ペア:

[(1, 21070000), (2, 10535000), (4, 5267500), (5, 4214000), (7, 3010000), (8, 2633750), (10, 2107000), (14, 1505000), (16, 1316875), (20, 1053500), (25, 842800), (28, 752500), (35, 602000), (40, 526750), (43, 490000), (49, 430000), (50, 421400), (56, 376250), (70, 301000), (80, 263375), (86, 245000), (98, 215000), (100, 210700), (112, 188125), (125, 168560), (140, 150500), (172, 122500), (175, 120400), (196, 107500), (200, 105350), (215, 98000), (245, 86000), (250, 84280), (280, 75250), (301, 70000), (344, 61250), (350, 60200), (392, 53750), (400, 52675), (430, 49000), (490, 43000), (500, 42140), (560, 37625), (602, 35000), (625, 33712), (688, 30625), (700, 30100), (784, 26875), (860, 24500), (875, 24080), (980, 21500), (1000, 21070), (1075, 19600), (1204, 17500), (1225, 17200), (1250, 16856), (1400, 15050), (1505, 14000), (1720, 12250), (1750, 12040), (1960, 10750), (2000, 10535), (2107, 10000), (2150, 9800), (2408, 8750), (2450, 8600), (2500, 8428), (2800, 7525), (3010, 7000), (3440, 6125), (3500, 6020), (3920, 5375), (4214, 5000), (4300, 4900), (4375, 4816)]