21086219

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:144

約数の個数: 48

約数和(自身を含む): 29548800

約数和(自身を除く): 8462581

約数列:

[1, 7, 11, 19, 29, 49, 71, 77, 133, 203, 209, 319, 497, 539, 551, 781, 931, 1349, 1421, 1463, 2059, 2233, 3479, 3857, 5467, 6061, 9443, 10241, 14413, 14839, 15631, 22649, 26999, 38269, 39121, 42427, 66101, 100891, 103873, 158543, 273847, 296989, 430331, 727111, 1109801, 1916929, 3012317, 21086219]

約数ペア:

[(1, 21086219), (7, 3012317), (11, 1916929), (19, 1109801), (29, 727111), (49, 430331), (71, 296989), (77, 273847), (133, 158543), (203, 103873), (209, 100891), (319, 66101), (497, 42427), (539, 39121), (551, 38269), (781, 26999), (931, 22649), (1349, 15631), (1421, 14839), (1463, 14413), (2059, 10241), (2233, 9443), (3479, 6061), (3857, 5467)]