20718776

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{113}}^1$

素因数の和:216

約数の個数: 64

約数和(自身を含む): 44241120

約数和(自身を除く): 23522344

約数列:

[1, 2, 4, 8, 13, 26, 41, 43, 52, 82, 86, 104, 113, 164, 172, 226, 328, 344, 452, 533, 559, 904, 1066, 1118, 1469, 1763, 2132, 2236, 2938, 3526, 4264, 4472, 4633, 4859, 5876, 7052, 9266, 9718, 11752, 14104, 18532, 19436, 22919, 37064, 38872, 45838, 60229, 63167, 91676, 120458, 126334, 183352, 199219, 240916, 252668, 398438, 481832, 505336, 796876, 1593752, 2589847, 5179694, 10359388, 20718776]

約数ペア:

[(1, 20718776), (2, 10359388), (4, 5179694), (8, 2589847), (13, 1593752), (26, 796876), (41, 505336), (43, 481832), (52, 398438), (82, 252668), (86, 240916), (104, 199219), (113, 183352), (164, 126334), (172, 120458), (226, 91676), (328, 63167), (344, 60229), (452, 45838), (533, 38872), (559, 37064), (904, 22919), (1066, 19436), (1118, 18532), (1469, 14104), (1763, 11752), (2132, 9718), (2236, 9266), (2938, 7052), (3526, 5876), (4264, 4859), (4472, 4633)]