19998220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{90901}}^1$

素因数の和:90921

約数の個数: 24

約数和(自身を含む): 45814608

約数和(自身を除く): 25816388

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 90901, 181802, 363604, 454505, 909010, 999911, 1818020, 1999822, 3999644, 4999555, 9999110, 19998220]

約数ペア:

[(1, 19998220), (2, 9999110), (4, 4999555), (5, 3999644), (10, 1999822), (11, 1818020), (20, 999911), (22, 909010), (44, 454505), (55, 363604), (110, 181802), (220, 90901)]