21807177

素因数分解:

$3^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{7927}}^1$

素因数の和:8068

約数の個数: 16

約数和(自身を含む): 33487872

約数和(自身を除く): 11680695

約数列:

[1, 3, 7, 21, 131, 393, 917, 2751, 7927, 23781, 55489, 166467, 1038437, 3115311, 7269059, 21807177]

約数ペア:

[(1, 21807177), (3, 7269059), (7, 3115311), (21, 1038437), (131, 166467), (393, 55489), (917, 23781), (2751, 7927)]