27981471

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{3691}}^1$

素因数の和:3739

約数の個数: 24

約数和(自身を含む): 45012864

約数和(自身を除く): 17031393

約数列:

[1, 3, 7, 19, 21, 57, 133, 361, 399, 1083, 2527, 3691, 7581, 11073, 25837, 70129, 77511, 210387, 490903, 1332451, 1472709, 3997353, 9327157, 27981471]

約数ペア:

[(1, 27981471), (3, 9327157), (7, 3997353), (19, 1472709), (21, 1332451), (57, 490903), (133, 210387), (361, 77511), (399, 70129), (1083, 25837), (2527, 11073), (3691, 7581)]