20453139

素因数分解:

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

素因数の和:2480

約数の個数: 36

約数和(自身を含む): 36190440

約数和(自身を除く): 15737301

約数列:

[1, 3, 7, 9, 19, 21, 49, 57, 63, 133, 147, 171, 399, 441, 931, 1197, 2441, 2793, 7323, 8379, 17087, 21969, 46379, 51261, 119609, 139137, 153783, 324653, 358827, 417411, 973959, 1076481, 2272571, 2921877, 6817713, 20453139]

約数ペア:

[(1, 20453139), (3, 6817713), (7, 2921877), (9, 2272571), (19, 1076481), (21, 973959), (49, 417411), (57, 358827), (63, 324653), (133, 153783), (147, 139137), (171, 119609), (399, 51261), (441, 46379), (931, 21969), (1197, 17087), (2441, 8379), (2793, 7323)]