21045260

素因数分解:

$2^2\times 5^1\times {\mathrm{263}}^1\times {\mathrm{4001}}^1$

素因数の和:4273

約数の個数: 24

約数和(自身を含む): 44374176

約数和(自身を除く): 23328916

約数列:

[1, 2, 4, 5, 10, 20, 263, 526, 1052, 1315, 2630, 4001, 5260, 8002, 16004, 20005, 40010, 80020, 1052263, 2104526, 4209052, 5261315, 10522630, 21045260]

約数ペア:

[(1, 21045260), (2, 10522630), (4, 5261315), (5, 4209052), (10, 2104526), (20, 1052263), (263, 80020), (526, 40010), (1052, 20005), (1315, 16004), (2630, 8002), (4001, 5260)]