21097181

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{103}}^1\times {\mathrm{1009}}^1$

素因数の和:1148

約数の個数: 16

約数和(自身を含む): 25209600

約数和(自身を除く): 4112419

約数列:

[1, 7, 29, 103, 203, 721, 1009, 2987, 7063, 20909, 29261, 103927, 204827, 727489, 3013883, 21097181]

約数ペア:

[(1, 21097181), (7, 3013883), (29, 727489), (103, 204827), (203, 103927), (721, 29261), (1009, 20909), (2987, 7063)]