20161281

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{269}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 11772159

約数列:

[1, 3, 7, 21, 43, 83, 129, 249, 269, 301, 581, 807, 903, 1743, 1883, 3569, 5649, 10707, 11567, 22327, 24983, 34701, 66981, 74949, 80969, 156289, 242907, 468867, 960061, 2880183, 6720427, 20161281]

約数ペア:

[(1, 20161281), (3, 6720427), (7, 2880183), (21, 960061), (43, 468867), (83, 242907), (129, 156289), (249, 80969), (269, 74949), (301, 66981), (581, 34701), (807, 24983), (903, 22327), (1743, 11567), (1883, 10707), (3569, 5649)]