21978803

素因数分解:

$7^2\times {\mathrm{11}}^3\times {\mathrm{337}}^1$

素因数の和:384

約数の個数: 24

約数和(自身を含む): 28205424

約数和(自身を除く): 6226621

約数列:

[1, 7, 11, 49, 77, 121, 337, 539, 847, 1331, 2359, 3707, 5929, 9317, 16513, 25949, 40777, 65219, 181643, 285439, 448547, 1998073, 3139829, 21978803]

約数ペア:

[(1, 21978803), (7, 3139829), (11, 1998073), (49, 448547), (77, 285439), (121, 181643), (337, 65219), (539, 40777), (847, 25949), (1331, 16513), (2359, 9317), (3707, 5929)]