20997889

素因数分解:

${\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{431}}^1$

素因数の和:588

約数の個数: 16

約数和(自身を含む): 23721984

約数和(自身を除く): 2724095

約数列:

[1, 11, 43, 103, 431, 473, 1133, 4429, 4741, 18533, 44393, 48719, 203863, 488323, 1908899, 20997889]

約数ペア:

[(1, 20997889), (11, 1908899), (43, 488323), (103, 203863), (431, 48719), (473, 44393), (1133, 18533), (4429, 4741)]