81620903

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47207}}^1$

素因数の和:47246

約数の個数: 16

約数和(自身を含む): 105745920

約数和(自身を除く): 24125017

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 47207, 330449, 613691, 896933, 4295837, 6278531, 11660129, 81620903]

約数ペア:

[(1, 81620903), (7, 11660129), (13, 6278531), (19, 4295837), (91, 896933), (133, 613691), (247, 330449), (1729, 47207)]