19988507

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{6037}}^1$

素因数の和:6098

約数の個数: 16

約数和(自身を含む): 25504512

約数和(自身を除く): 5516005

約数列:

[1, 7, 11, 43, 77, 301, 473, 3311, 6037, 42259, 66407, 259591, 464849, 1817137, 2855501, 19988507]

約数ペア:

[(1, 19988507), (7, 2855501), (11, 1817137), (43, 464849), (77, 259591), (301, 66407), (473, 42259), (3311, 6037)]