18720040

素因数分解:

$2^3\times 5^1\times {\mathrm{468001}}^1$

素因数の和:468012

約数の個数: 16

約数和(自身を含む): 42120180

約数和(自身を除く): 23400140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 468001, 936002, 1872004, 2340005, 3744008, 4680010, 9360020, 18720040]

約数ペア:

[(1, 18720040), (2, 9360020), (4, 4680010), (5, 3744008), (8, 2340005), (10, 1872004), (20, 936002), (40, 468001)]