21138279

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{359}}^1\times {\mathrm{1033}}^1$

素因数の和:1414

約数の個数: 16

約数和(自身を含む): 29779200

約数和(自身を除く): 8640921

約数列:

[1, 3, 19, 57, 359, 1033, 1077, 3099, 6821, 19627, 20463, 58881, 370847, 1112541, 7046093, 21138279]

約数ペア:

[(1, 21138279), (3, 7046093), (19, 1112541), (57, 370847), (359, 58881), (1033, 20463), (1077, 19627), (3099, 6821)]