18505221

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{2441}}^1$

素因数の和:2489

約数の個数: 24

約数和(自身を含む): 29772864

約数和(自身を除く): 11267643

約数列:

[1, 3, 7, 19, 21, 57, 133, 361, 399, 1083, 2441, 2527, 7323, 7581, 17087, 46379, 51261, 139137, 324653, 881201, 973959, 2643603, 6168407, 18505221]

約数ペア:

[(1, 18505221), (3, 6168407), (7, 2643603), (19, 973959), (21, 881201), (57, 324653), (133, 139137), (361, 51261), (399, 46379), (1083, 17087), (2441, 7581), (2527, 7323)]