19915389

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{18913}}^1$

素因数の和:18938

約数の個数: 20

約数和(自身を含む): 32040316

約数和(自身を除く): 12124927

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 18913, 56739, 170217, 245869, 510651, 737607, 1531953, 2212821, 6638463, 19915389]

約数ペア:

[(1, 19915389), (3, 6638463), (9, 2212821), (13, 1531953), (27, 737607), (39, 510651), (81, 245869), (117, 170217), (351, 56739), (1053, 18913)]