20912157

素因数分解:

$3^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{6263}}^1$

素因数の和:6329

約数の個数: 24

約数和(自身を含む): 35178624

約数和(自身を除く): 14266467

約数列:

[1, 3, 7, 9, 21, 53, 63, 159, 371, 477, 1113, 3339, 6263, 18789, 43841, 56367, 131523, 331939, 394569, 995817, 2323573, 2987451, 6970719, 20912157]

約数ペア:

[(1, 20912157), (3, 6970719), (7, 2987451), (9, 2323573), (21, 995817), (53, 394569), (63, 331939), (159, 131523), (371, 56367), (477, 43841), (1113, 18789), (3339, 6263)]