21065571

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{1877}}^1$

素因数の和:1955

約数の個数: 24

約数和(自身を含む): 32226480

約数和(自身を除く): 11160909

約数列:

[1, 3, 9, 29, 43, 87, 129, 261, 387, 1247, 1877, 3741, 5631, 11223, 16893, 54433, 80711, 163299, 242133, 489897, 726399, 2340619, 7021857, 21065571]

約数ペア:

[(1, 21065571), (3, 7021857), (9, 2340619), (29, 726399), (43, 489897), (87, 242133), (129, 163299), (261, 80711), (387, 54433), (1247, 16893), (1877, 11223), (3741, 5631)]