20981968

素因数分解:

$2^4\times 7^1\times {\mathrm{187339}}^1$

素因数の和:187354

約数の個数: 20

約数和(自身を含む): 46460320

約数和(自身を除く): 25478352

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 187339, 374678, 749356, 1311373, 1498712, 2622746, 2997424, 5245492, 10490984, 20981968]

約数ペア:

[(1, 20981968), (2, 10490984), (4, 5245492), (7, 2997424), (8, 2622746), (14, 1498712), (16, 1311373), (28, 749356), (56, 374678), (112, 187339)]