21990999

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{193}}^1\times {\mathrm{1999}}^1$

素因数の和:2214

約数の個数: 16

約数和(自身を含む): 31040000

約数和(自身を除く): 9049001

約数列:

[1, 3, 19, 57, 193, 579, 1999, 3667, 5997, 11001, 37981, 113943, 385807, 1157421, 7330333, 21990999]

約数ペア:

[(1, 21990999), (3, 7330333), (19, 1157421), (57, 385807), (193, 113943), (579, 37981), (1999, 11001), (3667, 5997)]