21406689

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{181}}^1\times {\mathrm{773}}^1$

素因数の和:977

約数の個数: 24

約数和(自身を含む): 32963112

約数和(自身を除く): 11556423

約数列:

[1, 3, 9, 17, 51, 153, 181, 543, 773, 1629, 2319, 3077, 6957, 9231, 13141, 27693, 39423, 118269, 139913, 419739, 1259217, 2378521, 7135563, 21406689]

約数ペア:

[(1, 21406689), (3, 7135563), (9, 2378521), (17, 1259217), (51, 419739), (153, 139913), (181, 118269), (543, 39423), (773, 27693), (1629, 13141), (2319, 9231), (3077, 6957)]