520080020

素因数分解:

$2^2\times 5^1\times {\mathrm{26004001}}^1$

素因数の和:26004010

約数の個数: 12

約数和(自身を含む): 1092168084

約数和(自身を除く): 572088064

約数列:

[1, 2, 4, 5, 10, 20, 26004001, 52008002, 104016004, 130020005, 260040010, 520080020]

約数ペア:

[(1, 520080020), (2, 260040010), (4, 130020005), (5, 104016004), (10, 52008002), (20, 26004001)]