20919801

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{23167}}^1$

素因数の和:23220

約数の個数: 16

約数和(自身を含む): 32620544

約数和(自身を除く): 11700743

約数列:

[1, 3, 7, 21, 43, 129, 301, 903, 23167, 69501, 162169, 486507, 996181, 2988543, 6973267, 20919801]

約数ペア:

[(1, 20919801), (3, 6973267), (7, 2988543), (21, 996181), (43, 486507), (129, 162169), (301, 69501), (903, 23167)]