19997490821

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{157}}^1\times {\mathrm{57041}}^1$

素因数の和:57245

約数の個数: 32

約数和(自身を含む): 25956391680

約数和(自身を除く): 5958900859

約数列:

[1, 7, 11, 29, 77, 157, 203, 319, 1099, 1727, 2233, 4553, 12089, 31871, 50083, 57041, 350581, 399287, 627451, 1654189, 4392157, 8955437, 11579323, 18196079, 62688059, 98509807, 127372553, 259707673, 689568649, 1817953711, 2856784403, 19997490821]

約数ペア:

[(1, 19997490821), (7, 2856784403), (11, 1817953711), (29, 689568649), (77, 259707673), (157, 127372553), (203, 98509807), (319, 62688059), (1099, 18196079), (1727, 11579323), (2233, 8955437), (4553, 4392157), (12089, 1654189), (31871, 627451), (50083, 399287), (57041, 350581)]