21005193

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{467}}^1$

素因数の和:557

約数の個数: 32

約数和(自身を含む): 32348160

約数和(自身を除く): 11342967

約数列:

[1, 3, 11, 29, 33, 47, 87, 141, 319, 467, 517, 957, 1363, 1401, 1551, 4089, 5137, 13543, 14993, 15411, 21949, 40629, 44979, 65847, 148973, 241439, 446919, 636521, 724317, 1909563, 7001731, 21005193]

約数ペア:

[(1, 21005193), (3, 7001731), (11, 1909563), (29, 724317), (33, 636521), (47, 446919), (87, 241439), (141, 148973), (319, 65847), (467, 44979), (517, 40629), (957, 21949), (1363, 15411), (1401, 14993), (1551, 13543), (4089, 5137)]