17920521

素因数分解:

$3^5\times {\mathrm{29}}^1\times {\mathrm{2543}}^1$

素因数の和:2587

約数の個数: 24

約数和(自身を含む): 27780480

約数和(自身を除く): 9859959

約数列:

[1, 3, 9, 27, 29, 81, 87, 243, 261, 783, 2349, 2543, 7047, 7629, 22887, 68661, 73747, 205983, 221241, 617949, 663723, 1991169, 5973507, 17920521]

約数ペア:

[(1, 17920521), (3, 5973507), (9, 1991169), (27, 663723), (29, 617949), (81, 221241), (87, 205983), (243, 73747), (261, 68661), (783, 22887), (2349, 7629), (2543, 7047)]