19937918

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{433}}^1$

素因数の和:489

約数の個数: 64

約数和(自身を含む): 41997312

約数和(自身を除く): 22059394

約数列:

[1, 2, 7, 11, 13, 14, 22, 23, 26, 46, 77, 91, 143, 154, 161, 182, 253, 286, 299, 322, 433, 506, 598, 866, 1001, 1771, 2002, 2093, 3031, 3289, 3542, 4186, 4763, 5629, 6062, 6578, 9526, 9959, 11258, 19918, 23023, 33341, 39403, 46046, 61919, 66682, 69713, 78806, 109549, 123838, 129467, 139426, 219098, 258934, 433433, 766843, 866866, 906269, 1424137, 1533686, 1812538, 2848274, 9968959, 19937918]

約数ペア:

[(1, 19937918), (2, 9968959), (7, 2848274), (11, 1812538), (13, 1533686), (14, 1424137), (22, 906269), (23, 866866), (26, 766843), (46, 433433), (77, 258934), (91, 219098), (143, 139426), (154, 129467), (161, 123838), (182, 109549), (253, 78806), (286, 69713), (299, 66682), (322, 61919), (433, 46046), (506, 39403), (598, 33341), (866, 23023), (1001, 19918), (1771, 11258), (2002, 9959), (2093, 9526), (3031, 6578), (3289, 6062), (3542, 5629), (4186, 4763)]