18686157

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{103}}^1\times {\mathrm{163}}^1$

素因数の和:329

約数の個数: 32

約数和(自身を含む): 29472768

約数和(自身を除く): 10786611

約数列:

[1, 3, 7, 21, 53, 103, 159, 163, 309, 371, 489, 721, 1113, 1141, 2163, 3423, 5459, 8639, 16377, 16789, 25917, 38213, 50367, 60473, 114639, 117523, 181419, 352569, 889817, 2669451, 6228719, 18686157]

約数ペア:

[(1, 18686157), (3, 6228719), (7, 2669451), (21, 889817), (53, 352569), (103, 181419), (159, 117523), (163, 114639), (309, 60473), (371, 50367), (489, 38213), (721, 25917), (1113, 16789), (1141, 16377), (2163, 8639), (3423, 5459)]