19688020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89491}}^1$

素因数の和:89511

約数の個数: 24

約数和(自身を含む): 45103968

約数和(自身を除く): 25415948

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 89491, 178982, 357964, 447455, 894910, 984401, 1789820, 1968802, 3937604, 4922005, 9844010, 19688020]

約数ペア:

[(1, 19688020), (2, 9844010), (4, 4922005), (5, 3937604), (10, 1968802), (11, 1789820), (20, 984401), (22, 894910), (44, 447455), (55, 357964), (110, 178982), (220, 89491)]