28738381

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{107}}^1$

素因数の和:229

約数の個数: 32

約数和(自身を含む): 36640512

約数和(自身を除く): 7902131

約数列:

[1, 7, 17, 37, 61, 107, 119, 259, 427, 629, 749, 1037, 1819, 2257, 3959, 4403, 6527, 7259, 12733, 15799, 27713, 38369, 45689, 67303, 110959, 241499, 268583, 471121, 776713, 1690493, 4105483, 28738381]

約数ペア:

[(1, 28738381), (7, 4105483), (17, 1690493), (37, 776713), (61, 471121), (107, 268583), (119, 241499), (259, 110959), (427, 67303), (629, 45689), (749, 38369), (1037, 27713), (1819, 15799), (2257, 12733), (3959, 7259), (4403, 6527)]