18988879

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{2939}}^1$

素因数の和:3030

約数の個数: 16

約数和(自身を含む): 23708160

約数和(自身を除く): 4719281

約数列:

[1, 7, 13, 71, 91, 497, 923, 2939, 6461, 20573, 38207, 208669, 267449, 1460683, 2712697, 18988879]

約数ペア:

[(1, 18988879), (7, 2712697), (13, 1460683), (71, 267449), (91, 208669), (497, 38207), (923, 20573), (2939, 6461)]