21047517681

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{641}}^1\times {\mathrm{154157}}^1$

素因数の和:154872

約数の個数: 16

約数和(自身を含む): 28503197568

約数和(自身を除く): 7455679887

約数列:

[1, 3, 71, 213, 641, 1923, 45511, 136533, 154157, 462471, 10945147, 32835441, 98814637, 296443911, 7015839227, 21047517681]

約数ペア:

[(1, 21047517681), (3, 7015839227), (71, 296443911), (213, 98814637), (641, 32835441), (1923, 10945147), (45511, 462471), (136533, 154157)]