51640040

素因数分解:

$2^3\times 5^1\times {\mathrm{1291001}}^1$

素因数の和:1291012

約数の個数: 16

約数和(自身を含む): 116190180

約数和(自身を除く): 64550140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1291001, 2582002, 5164004, 6455005, 10328008, 12910010, 25820020, 51640040]

約数ペア:

[(1, 51640040), (2, 25820020), (4, 12910010), (5, 10328008), (8, 6455005), (10, 5164004), (20, 2582002), (40, 1291001)]