57780020

素因数分解:

$2^2\times 5^1\times {\mathrm{2889001}}^1$

素因数の和:2889010

約数の個数: 12

約数和(自身を含む): 121338084

約数和(自身を除く): 63558064

約数列:

[1, 2, 4, 5, 10, 20, 2889001, 5778002, 11556004, 14445005, 28890010, 57780020]

約数ペア:

[(1, 57780020), (2, 28890010), (4, 14445005), (5, 11556004), (10, 5778002), (20, 2889001)]