81288020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{369491}}^1$

素因数の和:369511

約数の個数: 24

約数和(自身を含む): 186223968

約数和(自身を除く): 104935948

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 369491, 738982, 1477964, 1847455, 3694910, 4064401, 7389820, 8128802, 16257604, 20322005, 40644010, 81288020]

約数ペア:

[(1, 81288020), (2, 40644010), (4, 20322005), (5, 16257604), (10, 8128802), (11, 7389820), (20, 4064401), (22, 3694910), (44, 1847455), (55, 1477964), (110, 738982), (220, 369491)]