21707791

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{1847}}^1$

素因数の和:1950

約数の個数: 16

約数和(自身を含む): 26256384

約数和(自身を除く): 4548593

約数列:

[1, 7, 23, 73, 161, 511, 1679, 1847, 11753, 12929, 42481, 134831, 297367, 943817, 3101113, 21707791]

約数ペア:

[(1, 21707791), (7, 3101113), (23, 943817), (73, 297367), (161, 134831), (511, 42481), (1679, 12929), (1847, 11753)]