21931911

素因数分解:

$3^3\times {\mathrm{31}}^1\times {\mathrm{26203}}^1$

素因数の和:26243

約数の個数: 16

約数和(自身を含む): 33541120

約数和(自身を除く): 11609209

約数列:

[1, 3, 9, 27, 31, 93, 279, 837, 26203, 78609, 235827, 707481, 812293, 2436879, 7310637, 21931911]

約数ペア:

[(1, 21931911), (3, 7310637), (9, 2436879), (27, 812293), (31, 707481), (93, 235827), (279, 78609), (837, 26203)]