21805509

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{827}}^1$

素因数の和:905

約数の個数: 32

約数和(自身を含む): 34338816

約数和(自身を除く): 12533307

約数列:

[1, 3, 11, 17, 33, 47, 51, 141, 187, 517, 561, 799, 827, 1551, 2397, 2481, 8789, 9097, 14059, 26367, 27291, 38869, 42177, 116607, 154649, 427559, 463947, 660773, 1282677, 1982319, 7268503, 21805509]

約数ペア:

[(1, 21805509), (3, 7268503), (11, 1982319), (17, 1282677), (33, 660773), (47, 463947), (51, 427559), (141, 154649), (187, 116607), (517, 42177), (561, 38869), (799, 27291), (827, 26367), (1551, 14059), (2397, 9097), (2481, 8789)]