20745109

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{419}}^1\times {\mathrm{643}}^1$

素因数の和:1080

約数の個数: 16

約数和(自身を含む): 25966080

約数和(自身を除く): 5220971

約数列:

[1, 7, 11, 77, 419, 643, 2933, 4501, 4609, 7073, 32263, 49511, 269417, 1885919, 2963587, 20745109]

約数ペア:

[(1, 20745109), (7, 2963587), (11, 1885919), (77, 269417), (419, 49511), (643, 32263), (2933, 7073), (4501, 4609)]