21199887

素因数分解:

$3^4\times {\mathrm{79}}^1\times {\mathrm{3313}}^1$

素因数の和:3404

約数の個数: 20

約数和(自身を含む): 32079520

約数和(自身を除く): 10879633

約数列:

[1, 3, 9, 27, 79, 81, 237, 711, 2133, 3313, 6399, 9939, 29817, 89451, 261727, 268353, 785181, 2355543, 7066629, 21199887]

約数ペア:

[(1, 21199887), (3, 7066629), (9, 2355543), (27, 785181), (79, 268353), (81, 261727), (237, 89451), (711, 29817), (2133, 9939), (3313, 6399)]