21511521

素因数分解:

$3^3\times {\mathrm{691}}^1\times {\mathrm{1153}}^1$

素因数の和:1853

約数の個数: 16

約数和(自身を含む): 31942720

約数和(自身を除く): 10431199

約数列:

[1, 3, 9, 27, 691, 1153, 2073, 3459, 6219, 10377, 18657, 31131, 796723, 2390169, 7170507, 21511521]

約数ペア:

[(1, 21511521), (3, 7170507), (9, 2390169), (27, 796723), (691, 31131), (1153, 18657), (2073, 10377), (3459, 6219)]