21185983

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{421}}^1$

素因数の和:527

約数の個数: 24

約数和(自身を含む): 26940480

約数和(自身を除く): 5754497

約数列:

[1, 7, 13, 49, 79, 91, 421, 553, 637, 1027, 2947, 3871, 5473, 7189, 20629, 33259, 38311, 50323, 232813, 268177, 432367, 1629691, 3026569, 21185983]

約数ペア:

[(1, 21185983), (7, 3026569), (13, 1629691), (49, 432367), (79, 268177), (91, 232813), (421, 50323), (553, 38311), (637, 33259), (1027, 20629), (2947, 7189), (3871, 5473)]