19902291

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{47}}^1$

素因数の和:128

約数の個数: 48

約数和(自身を含む): 31601664

約数和(自身を除く): 11699373

約数列:

[1, 3, 17, 19, 23, 47, 51, 57, 69, 141, 323, 361, 391, 437, 799, 893, 969, 1081, 1083, 1173, 1311, 2397, 2679, 3243, 6137, 7429, 8303, 15181, 16967, 18377, 18411, 20539, 22287, 24909, 45543, 50901, 55131, 61617, 141151, 288439, 349163, 390241, 423453, 865317, 1047489, 1170723, 6634097, 19902291]

約数ペア:

[(1, 19902291), (3, 6634097), (17, 1170723), (19, 1047489), (23, 865317), (47, 423453), (51, 390241), (57, 349163), (69, 288439), (141, 141151), (323, 61617), (361, 55131), (391, 50901), (437, 45543), (799, 24909), (893, 22287), (969, 20539), (1081, 18411), (1083, 18377), (1173, 16967), (1311, 15181), (2397, 8303), (2679, 7429), (3243, 6137)]