20811763

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{157}}^1\times {\mathrm{653}}^1$

素因数の和:846

約数の個数: 16

約数和(自身を含む): 24799680

約数和(自身を除く): 3987917

約数列:

[1, 7, 29, 157, 203, 653, 1099, 4553, 4571, 18937, 31871, 102521, 132559, 717647, 2973109, 20811763]

約数ペア:

[(1, 20811763), (7, 2973109), (29, 717647), (157, 132559), (203, 102521), (653, 31871), (1099, 18937), (4553, 4571)]