18729837

素因数分解:

$3^2\times 7^1\times {\mathrm{211}}^1\times {\mathrm{1409}}^1$

素因数の和:1633

約数の個数: 24

約数和(自身を含む): 31087680

約数和(自身を除く): 12357843

約数列:

[1, 3, 7, 9, 21, 63, 211, 633, 1409, 1477, 1899, 4227, 4431, 9863, 12681, 13293, 29589, 88767, 297299, 891897, 2081093, 2675691, 6243279, 18729837]

約数ペア:

[(1, 18729837), (3, 6243279), (7, 2675691), (9, 2081093), (21, 891897), (63, 297299), (211, 88767), (633, 29589), (1409, 13293), (1477, 12681), (1899, 9863), (4227, 4431)]