81715480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{617}}^1$

素因数の和:689

約数の個数: 128

約数和(自身を含む): 234938880

約数和(自身を除く): 153223400

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 43, 44, 55, 56, 70, 77, 86, 88, 110, 140, 154, 172, 215, 220, 280, 301, 308, 344, 385, 430, 440, 473, 602, 616, 617, 770, 860, 946, 1204, 1234, 1505, 1540, 1720, 1892, 2365, 2408, 2468, 3010, 3080, 3085, 3311, 3784, 4319, 4730, 4936, 6020, 6170, 6622, 6787, 8638, 9460, 12040, 12340, 13244, 13574, 16555, 17276, 18920, 21595, 24680, 26488, 26531, 27148, 33110, 33935, 34552, 43190, 47509, 53062, 54296, 66220, 67870, 86380, 95018, 106124, 132440, 132655, 135740, 172760, 185717, 190036, 212248, 237545, 265310, 271480, 291841, 371434, 380072, 475090, 530620, 583682, 742868, 928585, 950180, 1061240, 1167364, 1459205, 1485736, 1857170, 1900360, 2042887, 2334728, 2918410, 3714340, 4085774, 5836820, 7428680, 8171548, 10214435, 11673640, 16343096, 20428870, 40857740, 81715480]

約数ペア:

[(1, 81715480), (2, 40857740), (4, 20428870), (5, 16343096), (7, 11673640), (8, 10214435), (10, 8171548), (11, 7428680), (14, 5836820), (20, 4085774), (22, 3714340), (28, 2918410), (35, 2334728), (40, 2042887), (43, 1900360), (44, 1857170), (55, 1485736), (56, 1459205), (70, 1167364), (77, 1061240), (86, 950180), (88, 928585), (110, 742868), (140, 583682), (154, 530620), (172, 475090), (215, 380072), (220, 371434), (280, 291841), (301, 271480), (308, 265310), (344, 237545), (385, 212248), (430, 190036), (440, 185717), (473, 172760), (602, 135740), (616, 132655), (617, 132440), (770, 106124), (860, 95018), (946, 86380), (1204, 67870), (1234, 66220), (1505, 54296), (1540, 53062), (1720, 47509), (1892, 43190), (2365, 34552), (2408, 33935), (2468, 33110), (3010, 27148), (3080, 26531), (3085, 26488), (3311, 24680), (3784, 21595), (4319, 18920), (4730, 17276), (4936, 16555), (6020, 13574), (6170, 13244), (6622, 12340), (6787, 12040), (8638, 9460)]