408040040

素因数分解:

$2^3\times 5^1\times {\mathrm{10201001}}^1$

素因数の和:10201012

約数の個数: 16

約数和(自身を含む): 918090180

約数和(自身を除く): 510050140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 10201001, 20402002, 40804004, 51005005, 81608008, 102010010, 204020020, 408040040]

約数ペア:

[(1, 408040040), (2, 204020020), (4, 102010010), (5, 81608008), (8, 51005005), (10, 40804004), (20, 20402002), (40, 10201001)]