19915907

素因数分解:

${\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{223}}^1\times {\mathrm{353}}^1$

素因数の和:610

約数の個数: 16

約数和(自身を含む): 22837248

約数和(自身を除く): 2921341

約数列:

[1, 11, 23, 223, 253, 353, 2453, 3883, 5129, 8119, 56419, 78719, 89309, 865909, 1810537, 19915907]

約数ペア:

[(1, 19915907), (11, 1810537), (23, 865909), (223, 89309), (253, 78719), (353, 56419), (2453, 8119), (3883, 5129)]