21078939

素因数分解:

$3^1\times 7^1\times {\mathrm{761}}^1\times {\mathrm{1319}}^1$

素因数の和:2090

約数の個数: 16

約数和(自身を含む): 32186880

約数和(自身を除く): 11107941

約数列:

[1, 3, 7, 21, 761, 1319, 2283, 3957, 5327, 9233, 15981, 27699, 1003759, 3011277, 7026313, 21078939]

約数ペア:

[(1, 21078939), (3, 7026313), (7, 3011277), (21, 1003759), (761, 27699), (1319, 15981), (2283, 9233), (3957, 5327)]