18721521

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{22859}}^1$

素因数の和:22885

約数の個数: 24

約数和(自身を含む): 33284160

約数和(自身を除く): 14562639

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819, 22859, 68577, 160013, 205731, 297167, 480039, 891501, 1440117, 2080169, 2674503, 6240507, 18721521]

約数ペア:

[(1, 18721521), (3, 6240507), (7, 2674503), (9, 2080169), (13, 1440117), (21, 891501), (39, 480039), (63, 297167), (91, 205731), (117, 160013), (273, 68577), (819, 22859)]