18321440

素因数分解:

$2^5\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2663}}^1$

素因数の和:2721

約数の個数: 48

約数和(自身を含む): 44307648

約数和(自身を除く): 25986208

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 80, 86, 160, 172, 215, 344, 430, 688, 860, 1376, 1720, 2663, 3440, 5326, 6880, 10652, 13315, 21304, 26630, 42608, 53260, 85216, 106520, 114509, 213040, 229018, 426080, 458036, 572545, 916072, 1145090, 1832144, 2290180, 3664288, 4580360, 9160720, 18321440]

約数ペア:

[(1, 18321440), (2, 9160720), (4, 4580360), (5, 3664288), (8, 2290180), (10, 1832144), (16, 1145090), (20, 916072), (32, 572545), (40, 458036), (43, 426080), (80, 229018), (86, 213040), (160, 114509), (172, 106520), (215, 85216), (344, 53260), (430, 42608), (688, 26630), (860, 21304), (1376, 13315), (1720, 10652), (2663, 6880), (3440, 5326)]