21809907

素因数分解:

$3^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{5167}}^1$

素因数の和:5247

約数の個数: 24

約数和(自身を含む): 36548096

約数和(自身を除く): 14738189

約数列:

[1, 3, 7, 9, 21, 63, 67, 201, 469, 603, 1407, 4221, 5167, 15501, 36169, 46503, 108507, 325521, 346189, 1038567, 2423323, 3115701, 7269969, 21809907]

約数ペア:

[(1, 21809907), (3, 7269969), (7, 3115701), (9, 2423323), (21, 1038567), (63, 346189), (67, 325521), (201, 108507), (469, 46503), (603, 36169), (1407, 15501), (4221, 5167)]