21931572159

素因数分解:

$3^2\times 7^1\times {\mathrm{348120193}}^1$

素因数の和:348120206

約数の個数: 12

約数和(自身を含む): 36204500176

約数和(自身を除く): 14272928017

約数列:

[1, 3, 7, 9, 21, 63, 348120193, 1044360579, 2436841351, 3133081737, 7310524053, 21931572159]

約数ペア:

[(1, 21931572159), (3, 7310524053), (7, 3133081737), (9, 2436841351), (21, 1044360579), (63, 348120193)]