17780020

素因数分解:

$2^2\times 5^1\times {\mathrm{889001}}^1$

素因数の和:889010

約数の個数: 12

約数和(自身を含む): 37338084

約数和(自身を除く): 19558064

約数列:

[1, 2, 4, 5, 10, 20, 889001, 1778002, 3556004, 4445005, 8890010, 17780020]

約数ペア:

[(1, 17780020), (2, 8890010), (4, 4445005), (5, 3556004), (10, 1778002), (20, 889001)]