19919185

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{2143}}^1$

素因数の和:2185

約数の個数: 24

約数和(自身を含む): 28249344

約数和(自身を除く): 8330159

約数列:

[1, 5, 11, 13, 55, 65, 143, 169, 715, 845, 1859, 2143, 9295, 10715, 23573, 27859, 117865, 139295, 306449, 362167, 1532245, 1810835, 3983837, 19919185]

約数ペア:

[(1, 19919185), (5, 3983837), (11, 1810835), (13, 1532245), (55, 362167), (65, 306449), (143, 139295), (169, 117865), (715, 27859), (845, 23573), (1859, 10715), (2143, 9295)]