19997211

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{17681}}^1$

素因数の和:17726

約数の個数: 16

約数和(自身を含む): 29705760

約数和(自身を除く): 9708549

約数列:

[1, 3, 13, 29, 39, 87, 377, 1131, 17681, 53043, 229853, 512749, 689559, 1538247, 6665737, 19997211]

約数ペア:

[(1, 19997211), (3, 6665737), (13, 1538247), (29, 689559), (39, 512749), (87, 229853), (377, 53043), (1131, 17681)]