21868209

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{467}}^1$

素因数の和:538

約数の個数: 36

約数和(自身を含む): 35603568

約数和(自身を除く): 13735359

約数列:

[1, 3, 9, 11, 33, 43, 99, 121, 129, 363, 387, 467, 473, 1089, 1401, 1419, 4203, 4257, 5137, 5203, 15411, 15609, 20081, 46233, 46827, 56507, 60243, 169521, 180729, 220891, 508563, 662673, 1988019, 2429801, 7289403, 21868209]

約数ペア:

[(1, 21868209), (3, 7289403), (9, 2429801), (11, 1988019), (33, 662673), (43, 508563), (99, 220891), (121, 180729), (129, 169521), (363, 60243), (387, 56507), (467, 46827), (473, 46233), (1089, 20081), (1401, 15609), (1419, 15411), (4203, 5203), (4257, 5137)]