21581307

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{7517}}^1$

素因数の和:7563

約数の個数: 24

約数和(自身を含む): 35184240

約数和(自身を除く): 13602933

約数列:

[1, 3, 9, 11, 29, 33, 87, 99, 261, 319, 957, 2871, 7517, 22551, 67653, 82687, 217993, 248061, 653979, 744183, 1961937, 2397923, 7193769, 21581307]

約数ペア:

[(1, 21581307), (3, 7193769), (9, 2397923), (11, 1961937), (29, 744183), (33, 653979), (87, 248061), (99, 217993), (261, 82687), (319, 67653), (957, 22551), (2871, 7517)]