19809111

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{21937}}^1$

素因数の和:21990

約数の個数: 16

約数和(自身を含む): 30888704

約数和(自身を除く): 11079593

約数列:

[1, 3, 7, 21, 43, 129, 301, 903, 21937, 65811, 153559, 460677, 943291, 2829873, 6603037, 19809111]

約数ペア:

[(1, 19809111), (3, 6603037), (7, 2829873), (21, 943291), (43, 460677), (129, 153559), (301, 65811), (903, 21937)]