21918457

素因数分解:

${\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1$

素因数の和:277

約数の個数: 32

約数和(自身を含む): 27648000

約数和(自身を除く): 5729543

約数列:

[1, 11, 17, 19, 31, 187, 199, 209, 323, 341, 527, 589, 2189, 3383, 3553, 3781, 5797, 6169, 6479, 10013, 37213, 41591, 64277, 67859, 104873, 110143, 117211, 707047, 1153603, 1289321, 1992587, 21918457]

約数ペア:

[(1, 21918457), (11, 1992587), (17, 1289321), (19, 1153603), (31, 707047), (187, 117211), (199, 110143), (209, 104873), (323, 67859), (341, 64277), (527, 41591), (589, 37213), (2189, 10013), (3383, 6479), (3553, 6169), (3781, 5797)]