18840040

素因数分解:

$2^3\times 5^1\times {\mathrm{449}}^1\times {\mathrm{1049}}^1$

素因数の和:1509

約数の個数: 32

約数和(自身を含む): 42525000

約数和(自身を除く): 23684960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 449, 898, 1049, 1796, 2098, 2245, 3592, 4196, 4490, 5245, 8392, 8980, 10490, 17960, 20980, 41960, 471001, 942002, 1884004, 2355005, 3768008, 4710010, 9420020, 18840040]

約数ペア:

[(1, 18840040), (2, 9420020), (4, 4710010), (5, 3768008), (8, 2355005), (10, 1884004), (20, 942002), (40, 471001), (449, 41960), (898, 20980), (1049, 17960), (1796, 10490), (2098, 8980), (2245, 8392), (3592, 5245), (4196, 4490)]