20367767

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1\times {\mathrm{431}}^1$

素因数の和:638

約数の個数: 16

約数和(自身を含む): 24026112

約数和(自身を除く): 3658345

約数列:

[1, 7, 43, 157, 301, 431, 1099, 3017, 6751, 18533, 47257, 67667, 129731, 473669, 2909681, 20367767]

約数ペア:

[(1, 20367767), (7, 2909681), (43, 473669), (157, 129731), (301, 67667), (431, 47257), (1099, 18533), (3017, 6751)]