20958749

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{709}}^1$

素因数の和:860

約数の個数: 16

約数和(自身を含む): 24810240

約数和(自身を除く): 3851491

約数列:

[1, 7, 41, 103, 287, 709, 721, 4223, 4963, 29069, 29561, 73027, 203483, 511189, 2994107, 20958749]

約数ペア:

[(1, 20958749), (7, 2994107), (41, 511189), (103, 203483), (287, 73027), (709, 29561), (721, 29069), (4223, 4963)]