20781719

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{4451}}^1$

素因数の和:4510

約数の個数: 16

約数和(自身を含む): 25643520

約数和(自身を除く): 4861801

約数列:

[1, 7, 23, 29, 161, 203, 667, 4451, 4669, 31157, 102373, 129079, 716611, 903553, 2968817, 20781719]

約数ペア:

[(1, 20781719), (7, 2968817), (23, 903553), (29, 716611), (161, 129079), (203, 102373), (667, 31157), (4451, 4669)]