21381668

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{6311}}^1$

素因数の和:6344

約数の個数: 36

約数和(自身を含む): 47011776

約数和(自身を除く): 25630108

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 121, 154, 242, 308, 484, 847, 1694, 3388, 6311, 12622, 25244, 44177, 69421, 88354, 138842, 176708, 277684, 485947, 763631, 971894, 1527262, 1943788, 3054524, 5345417, 10690834, 21381668]

約数ペア:

[(1, 21381668), (2, 10690834), (4, 5345417), (7, 3054524), (11, 1943788), (14, 1527262), (22, 971894), (28, 763631), (44, 485947), (77, 277684), (121, 176708), (154, 138842), (242, 88354), (308, 69421), (484, 44177), (847, 25244), (1694, 12622), (3388, 6311)]