18643009

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{12743}}^1$

素因数の和:12780

約数の個数: 16

約数和(自身を含む): 24468480

約数和(自身を除く): 5825471

約数列:

[1, 7, 11, 19, 77, 133, 209, 1463, 12743, 89201, 140173, 242117, 981211, 1694819, 2663287, 18643009]

約数ペア:

[(1, 18643009), (7, 2663287), (11, 1694819), (19, 981211), (77, 242117), (133, 140173), (209, 89201), (1463, 12743)]