21612987

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{191}}^1$

素因数の和:341

約数の個数: 40

約数和(自身を含む): 35684352

約数和(自身を除く): 14071365

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 127, 191, 297, 381, 573, 891, 1143, 1397, 1719, 2101, 3429, 4191, 5157, 6303, 10287, 12573, 15471, 18909, 24257, 37719, 56727, 72771, 113157, 170181, 218313, 266827, 654939, 800481, 1964817, 2401443, 7204329, 21612987]

約数ペア:

[(1, 21612987), (3, 7204329), (9, 2401443), (11, 1964817), (27, 800481), (33, 654939), (81, 266827), (99, 218313), (127, 170181), (191, 113157), (297, 72771), (381, 56727), (573, 37719), (891, 24257), (1143, 18909), (1397, 15471), (1719, 12573), (2101, 10287), (3429, 6303), (4191, 5157)]