20921817

素因数分解:

$3^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{9311}}^1$

素因数の和:9428

約数の個数: 16

約数和(自身を含む): 32182272

約数和(自身を除く): 11260455

約数列:

[1, 3, 7, 21, 107, 321, 749, 2247, 9311, 27933, 65177, 195531, 996277, 2988831, 6973939, 20921817]

約数ペア:

[(1, 20921817), (3, 6973939), (7, 2988831), (21, 996277), (107, 195531), (321, 65177), (749, 27933), (2247, 9311)]