81497780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6397}}^1$

素因数の和:6433

約数の個数: 72

約数和(自身を含む): 214435368

約数和(自身を除く): 132937588

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1820, 2548, 3185, 6370, 6397, 12740, 12794, 25588, 31985, 44779, 63970, 83161, 89558, 127940, 166322, 179116, 223895, 313453, 332644, 415805, 447790, 582127, 626906, 831610, 895580, 1164254, 1253812, 1567265, 1663220, 2328508, 2910635, 3134530, 4074889, 5821270, 6269060, 8149778, 11642540, 16299556, 20374445, 40748890, 81497780]

約数ペア:

[(1, 81497780), (2, 40748890), (4, 20374445), (5, 16299556), (7, 11642540), (10, 8149778), (13, 6269060), (14, 5821270), (20, 4074889), (26, 3134530), (28, 2910635), (35, 2328508), (49, 1663220), (52, 1567265), (65, 1253812), (70, 1164254), (91, 895580), (98, 831610), (130, 626906), (140, 582127), (182, 447790), (196, 415805), (245, 332644), (260, 313453), (364, 223895), (455, 179116), (490, 166322), (637, 127940), (910, 89558), (980, 83161), (1274, 63970), (1820, 44779), (2548, 31985), (3185, 25588), (6370, 12794), (6397, 12740)]