21986515

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{1163}}^1$

素因数の和:1386

約数の個数: 16

約数和(自身を含む): 27936000

約数和(自身を除く): 5949485

約数列:

[1, 5, 19, 95, 199, 995, 1163, 3781, 5815, 18905, 22097, 110485, 231437, 1157185, 4397303, 21986515]

約数ペア:

[(1, 21986515), (5, 4397303), (19, 1157185), (95, 231437), (199, 110485), (995, 22097), (1163, 18905), (3781, 5815)]