20690691

素因数分解:

$3^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{3433}}^1$

素因数の和:3491

約数の個数: 24

約数和(自身を含む): 32883984

約数和(自身を除く): 12193293

約数列:

[1, 3, 7, 21, 41, 49, 123, 147, 287, 861, 2009, 3433, 6027, 10299, 24031, 72093, 140753, 168217, 422259, 504651, 985271, 2955813, 6896897, 20690691]

約数ペア:

[(1, 20690691), (3, 6896897), (7, 2955813), (21, 985271), (41, 504651), (49, 422259), (123, 168217), (147, 140753), (287, 72093), (861, 24031), (2009, 10299), (3433, 6027)]