21156109

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{3301}}^1$

素因数の和:3360

約数の個数: 16

約数和(自身を含む): 24963120

約数和(自身を除く): 3807011

約数列:

[1, 13, 17, 29, 221, 377, 493, 3301, 6409, 42913, 56117, 95729, 729521, 1244477, 1627393, 21156109]

約数ペア:

[(1, 21156109), (13, 1627393), (17, 1244477), (29, 729521), (221, 95729), (377, 56117), (493, 42913), (3301, 6409)]