21557179

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{103}}^1\times {\mathrm{1031}}^1$

素因数の和:1170

約数の個数: 16

約数和(自身を含む): 25758720

約数和(自身を除く): 4201541

約数列:

[1, 7, 29, 103, 203, 721, 1031, 2987, 7217, 20909, 29899, 106193, 209293, 743351, 3079597, 21557179]

約数ペア:

[(1, 21557179), (7, 3079597), (29, 743351), (103, 209293), (203, 106193), (721, 29899), (1031, 20909), (2987, 7217)]