21740859

素因数分解:

$3^3\times 7^2\times {\mathrm{16433}}^1$

素因数の和:16456

約数の個数: 24

約数和(自身を含む): 37469520

約数和(自身を除く): 15728661

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 441, 1323, 16433, 49299, 115031, 147897, 345093, 443691, 805217, 1035279, 2415651, 3105837, 7246953, 21740859]

約数ペア:

[(1, 21740859), (3, 7246953), (7, 3105837), (9, 2415651), (21, 1035279), (27, 805217), (49, 443691), (63, 345093), (147, 147897), (189, 115031), (441, 49299), (1323, 16433)]