20794540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79979}}^1$

素因数の和:80001

約数の個数: 24

約数和(自身を含む): 47028240

約数和(自身を除く): 26233700

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 79979, 159958, 319916, 399895, 799790, 1039727, 1599580, 2079454, 4158908, 5198635, 10397270, 20794540]

約数ペア:

[(1, 20794540), (2, 10397270), (4, 5198635), (5, 4158908), (10, 2079454), (13, 1599580), (20, 1039727), (26, 799790), (52, 399895), (65, 319916), (130, 159958), (260, 79979)]