21187496

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{3947}}^1$

素因数の和:4025

約数の個数: 32

約数和(自身を含む): 44059680

約数和(自身を除く): 22872184

約数列:

[1, 2, 4, 8, 11, 22, 44, 61, 88, 122, 244, 488, 671, 1342, 2684, 3947, 5368, 7894, 15788, 31576, 43417, 86834, 173668, 240767, 347336, 481534, 963068, 1926136, 2648437, 5296874, 10593748, 21187496]

約数ペア:

[(1, 21187496), (2, 10593748), (4, 5296874), (8, 2648437), (11, 1926136), (22, 963068), (44, 481534), (61, 347336), (88, 240767), (122, 173668), (244, 86834), (488, 43417), (671, 31576), (1342, 15788), (2684, 7894), (3947, 5368)]