20991267

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{4931}}^1$

素因数の和:4991

約数の個数: 24

約数和(自身を含む): 33853248

約数和(自身を除く): 12861981

約数列:

[1, 3, 9, 11, 33, 43, 99, 129, 387, 473, 1419, 4257, 4931, 14793, 44379, 54241, 162723, 212033, 488169, 636099, 1908297, 2332363, 6997089, 20991267]

約数ペア:

[(1, 20991267), (3, 6997089), (9, 2332363), (11, 1908297), (33, 636099), (43, 488169), (99, 212033), (129, 162723), (387, 54241), (473, 44379), (1419, 14793), (4257, 4931)]