20817927

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{13687}}^1$

素因数の和:13719

約数の個数: 18

約数和(自身を含む): 32563752

約数和(自身を除く): 11745825

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 13687, 41061, 123183, 177931, 533793, 1601379, 2313103, 6939309, 20817927]

約数ペア:

[(1, 20817927), (3, 6939309), (9, 2313103), (13, 1601379), (39, 533793), (117, 177931), (169, 123183), (507, 41061), (1521, 13687)]