20011805

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{1259}}^1$

素因数の和:1309

約数の個数: 24

約数和(自身を含む): 27851040

約数和(自身を除く): 7839235

約数列:

[1, 5, 11, 17, 55, 85, 187, 289, 935, 1259, 1445, 3179, 6295, 13849, 15895, 21403, 69245, 107015, 235433, 363851, 1177165, 1819255, 4002361, 20011805]

約数ペア:

[(1, 20011805), (5, 4002361), (11, 1819255), (17, 1177165), (55, 363851), (85, 235433), (187, 107015), (289, 69245), (935, 21403), (1259, 15895), (1445, 13849), (3179, 6295)]