21919513

素因数分解:

$7^2\times {\mathrm{11}}^2\times {\mathrm{3697}}^1$

素因数の和:3733

約数の個数: 18

約数和(自身を含む): 28034538

約数和(自身を除く): 6115025

約数列:

[1, 7, 11, 49, 77, 121, 539, 847, 3697, 5929, 25879, 40667, 181153, 284669, 447337, 1992683, 3131359, 21919513]

約数ペア:

[(1, 21919513), (7, 3131359), (11, 1992683), (49, 447337), (77, 284669), (121, 181153), (539, 40667), (847, 25879), (3697, 5929)]