21785666

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{81901}}^1$

素因数の和:81929

約数の個数: 16

約数和(自身を含む): 39312960

約数和(自身を除く): 17527294

約数列:

[1, 2, 7, 14, 19, 38, 133, 266, 81901, 163802, 573307, 1146614, 1556119, 3112238, 10892833, 21785666]

約数ペア:

[(1, 21785666), (2, 10892833), (7, 3112238), (14, 1556119), (19, 1146614), (38, 573307), (133, 163802), (266, 81901)]