81842740

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{3631}}^1$

素因数の和:3677

約数の個数: 72

約数和(自身を含む): 208680192

約数和(自身を除く): 126837452

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 49, 70, 92, 98, 115, 140, 161, 196, 230, 245, 322, 460, 490, 644, 805, 980, 1127, 1610, 2254, 3220, 3631, 4508, 5635, 7262, 11270, 14524, 18155, 22540, 25417, 36310, 50834, 72620, 83513, 101668, 127085, 167026, 177919, 254170, 334052, 355838, 417565, 508340, 584591, 711676, 835130, 889595, 1169182, 1670260, 1779190, 2338364, 2922955, 3558380, 4092137, 5845910, 8184274, 11691820, 16368548, 20460685, 40921370, 81842740]

約数ペア:

[(1, 81842740), (2, 40921370), (4, 20460685), (5, 16368548), (7, 11691820), (10, 8184274), (14, 5845910), (20, 4092137), (23, 3558380), (28, 2922955), (35, 2338364), (46, 1779190), (49, 1670260), (70, 1169182), (92, 889595), (98, 835130), (115, 711676), (140, 584591), (161, 508340), (196, 417565), (230, 355838), (245, 334052), (322, 254170), (460, 177919), (490, 167026), (644, 127085), (805, 101668), (980, 83513), (1127, 72620), (1610, 50834), (2254, 36310), (3220, 25417), (3631, 22540), (4508, 18155), (5635, 14524), (7262, 11270)]