21002571

素因数分解:

$3^4\times {\mathrm{383}}^1\times {\mathrm{677}}^1$

素因数の和:1072

約数の個数: 20

約数和(自身を含む): 31502592

約数和(自身を除く): 10500021

約数列:

[1, 3, 9, 27, 81, 383, 677, 1149, 2031, 3447, 6093, 10341, 18279, 31023, 54837, 259291, 777873, 2333619, 7000857, 21002571]

約数ペア:

[(1, 21002571), (3, 7000857), (9, 2333619), (27, 777873), (81, 259291), (383, 54837), (677, 31023), (1149, 18279), (2031, 10341), (3447, 6093)]