18720261

素因数分解:

$3^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{2677}}^1$

素因数の和:2730

約数の個数: 32

約数和(自身を含む): 32564480

約数和(自身を除く): 13844219

約数列:

[1, 3, 7, 9, 21, 27, 37, 63, 111, 189, 259, 333, 777, 999, 2331, 2677, 6993, 8031, 18739, 24093, 56217, 72279, 99049, 168651, 297147, 505953, 693343, 891441, 2080029, 2674323, 6240087, 18720261]

約数ペア:

[(1, 18720261), (3, 6240087), (7, 2674323), (9, 2080029), (21, 891441), (27, 693343), (37, 505953), (63, 297147), (111, 168651), (189, 99049), (259, 72279), (333, 56217), (777, 24093), (999, 18739), (2331, 8031), (2677, 6993)]