21680113

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{137}}^1$

素因数の和:241

約数の個数: 32

約数和(自身を含む): 28191744

約数和(自身を除く): 6511631

約数列:

[1, 7, 13, 37, 47, 91, 137, 259, 329, 481, 611, 959, 1739, 1781, 3367, 4277, 5069, 6439, 12173, 12467, 22607, 35483, 45073, 65897, 83707, 158249, 238243, 461279, 585949, 1667701, 3097159, 21680113]

約数ペア:

[(1, 21680113), (7, 3097159), (13, 1667701), (37, 585949), (47, 461279), (91, 238243), (137, 158249), (259, 83707), (329, 65897), (481, 45073), (611, 35483), (959, 22607), (1739, 12467), (1781, 12173), (3367, 6439), (4277, 5069)]