20690439

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{2083}}^1$

素因数の和:2147

約数の個数: 32

約数和(自身を含む): 35211264

約数和(自身を除く): 14520825

約数列:

[1, 3, 7, 11, 21, 33, 43, 77, 129, 231, 301, 473, 903, 1419, 2083, 3311, 6249, 9933, 14581, 22913, 43743, 68739, 89569, 160391, 268707, 481173, 626983, 985259, 1880949, 2955777, 6896813, 20690439]

約数ペア:

[(1, 20690439), (3, 6896813), (7, 2955777), (11, 1880949), (21, 985259), (33, 626983), (43, 481173), (77, 268707), (129, 160391), (231, 89569), (301, 68739), (473, 43743), (903, 22913), (1419, 14581), (2083, 9933), (3311, 6249)]