20981709

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{8123}}^1$

素因数の和:8177

約数の個数: 24

約数和(自身を含む): 35485632

約数和(自身を除く): 14503923

約数列:

[1, 3, 7, 9, 21, 41, 63, 123, 287, 369, 861, 2583, 8123, 24369, 56861, 73107, 170583, 333043, 511749, 999129, 2331301, 2997387, 6993903, 20981709]

約数ペア:

[(1, 20981709), (3, 6993903), (7, 2997387), (9, 2331301), (21, 999129), (41, 511749), (63, 333043), (123, 170583), (287, 73107), (369, 56861), (861, 24369), (2583, 8123)]