21681617

素因数分解:

${\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{647}}^1$

素因数の和:748

約数の個数: 16

約数和(自身を含む): 23887872

約数和(自身を除く): 2206255

約数列:

[1, 23, 31, 47, 647, 713, 1081, 1457, 14881, 20057, 30409, 33511, 461311, 699407, 942679, 21681617]

約数ペア:

[(1, 21681617), (23, 942679), (31, 699407), (47, 461311), (647, 33511), (713, 30409), (1081, 20057), (1457, 14881)]