19996587

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{13147}}^1$

素因数の和:13179

約数の個数: 18

約数和(自身を含む): 31279092

約数和(自身を除く): 11282505

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 13147, 39441, 118323, 170911, 512733, 1538199, 2221843, 6665529, 19996587]

約数ペア:

[(1, 19996587), (3, 6665529), (9, 2221843), (13, 1538199), (39, 512733), (117, 170911), (169, 118323), (507, 39441), (1521, 13147)]