19780387

素因数分解:

${\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:175

約数の個数: 32

約数和(自身を含む): 24330240

約数和(自身を除く): 4549853

約数列:

[1, 11, 19, 31, 43, 71, 209, 341, 473, 589, 781, 817, 1333, 1349, 2201, 3053, 6479, 8987, 14663, 14839, 24211, 25327, 33583, 41819, 58007, 94643, 278597, 460009, 638077, 1041073, 1798217, 19780387]

約数ペア:

[(1, 19780387), (11, 1798217), (19, 1041073), (31, 638077), (43, 460009), (71, 278597), (209, 94643), (341, 58007), (473, 41819), (589, 33583), (781, 25327), (817, 24211), (1333, 14839), (1349, 14663), (2201, 8987), (3053, 6479)]