21131187

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{5381}}^1$

素因数の和:5419

約数の個数: 32

約数和(自身を含む): 37200384

約数和(自身を除く): 16069197

約数列:

[1, 3, 7, 11, 17, 21, 33, 51, 77, 119, 187, 231, 357, 561, 1309, 3927, 5381, 16143, 37667, 59191, 91477, 113001, 177573, 274431, 414337, 640339, 1006247, 1243011, 1921017, 3018741, 7043729, 21131187]

約数ペア:

[(1, 21131187), (3, 7043729), (7, 3018741), (11, 1921017), (17, 1243011), (21, 1006247), (33, 640339), (51, 414337), (77, 274431), (119, 177573), (187, 113001), (231, 91477), (357, 59191), (561, 37667), (1309, 16143), (3927, 5381)]