12794911180

素因数分解:

$2^2\times 5^1\times {\mathrm{639745559}}^1$

素因数の和:639745568

約数の個数: 12

約数和(自身を含む): 26869313520

約数和(自身を除く): 14074402340

約数列:

[1, 2, 4, 5, 10, 20, 639745559, 1279491118, 2558982236, 3198727795, 6397455590, 12794911180]

約数ペア:

[(1, 12794911180), (2, 6397455590), (4, 3198727795), (5, 2558982236), (10, 1279491118), (20, 639745559)]