21897621

素因数分解:

$3^4\times {\mathrm{43}}^1\times {\mathrm{6287}}^1$

素因数の和:6342

約数の個数: 20

約数和(自身を含む): 33477312

約数和(自身を除く): 11579691

約数列:

[1, 3, 9, 27, 43, 81, 129, 387, 1161, 3483, 6287, 18861, 56583, 169749, 270341, 509247, 811023, 2433069, 7299207, 21897621]

約数ペア:

[(1, 21897621), (3, 7299207), (9, 2433069), (27, 811023), (43, 509247), (81, 270341), (129, 169749), (387, 56583), (1161, 18861), (3483, 6287)]