21531663

素因数分解:

$3^4\times {\mathrm{241}}^1\times {\mathrm{1103}}^1$

素因数の和:1356

約数の個数: 20

約数和(自身を含む): 32327328

約数和(自身を除く): 10795665

約数列:

[1, 3, 9, 27, 81, 241, 723, 1103, 2169, 3309, 6507, 9927, 19521, 29781, 89343, 265823, 797469, 2392407, 7177221, 21531663]

約数ペア:

[(1, 21531663), (3, 7177221), (9, 2392407), (27, 797469), (81, 265823), (241, 89343), (723, 29781), (1103, 19521), (2169, 9927), (3309, 6507)]