21000681205

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1\times {\mathrm{85607}}^1$

素因数の和:85825

約数の個数: 32

約数和(自身を含む): 29651871744

約数和(自身を除く): 8651190539

約数列:

[1, 5, 7, 35, 43, 163, 215, 301, 815, 1141, 1505, 5705, 7009, 35045, 49063, 85607, 245315, 428035, 599249, 2996245, 3681101, 13953941, 18405505, 25767707, 69769705, 97677587, 128838535, 488387935, 600019463, 3000097315, 4200136241, 21000681205]

約数ペア:

[(1, 21000681205), (5, 4200136241), (7, 3000097315), (35, 600019463), (43, 488387935), (163, 128838535), (215, 97677587), (301, 69769705), (815, 25767707), (1141, 18405505), (1505, 13953941), (5705, 3681101), (7009, 2996245), (35045, 599249), (49063, 428035), (85607, 245315)]