21920403

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{163}}^1\times {\mathrm{1949}}^1$

素因数の和:2138

約数の個数: 16

約数和(自身を含む): 30700800

約数和(自身を除く): 8780397

約数列:

[1, 3, 23, 69, 163, 489, 1949, 3749, 5847, 11247, 44827, 134481, 317687, 953061, 7306801, 21920403]

約数ペア:

[(1, 21920403), (3, 7306801), (23, 953061), (69, 317687), (163, 134481), (489, 44827), (1949, 11247), (3749, 5847)]