21808490

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{198259}}^1$

素因数の和:198277

約数の個数: 16

約数和(自身を含む): 42824160

約数和(自身を除く): 21015670

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 198259, 396518, 991295, 1982590, 2180849, 4361698, 10904245, 21808490]

約数ペア:

[(1, 21808490), (2, 10904245), (5, 4361698), (10, 2180849), (11, 1982590), (22, 991295), (55, 396518), (110, 198259)]