20963919

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1\times {\mathrm{997}}^1$

素因数の和:1206

約数の個数: 16

約数和(自身を含む): 28806272

約数和(自身を除く): 7842353

約数列:

[1, 3, 43, 129, 163, 489, 997, 2991, 7009, 21027, 42871, 128613, 162511, 487533, 6987973, 20963919]

約数ペア:

[(1, 20963919), (3, 6987973), (43, 487533), (129, 162511), (163, 128613), (489, 42871), (997, 21027), (2991, 7009)]