8320040

素因数分解:

$2^3\times 5^1\times {\mathrm{208001}}^1$

素因数の和:208012

約数の個数: 16

約数和(自身を含む): 18720180

約数和(自身を除く): 10400140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 208001, 416002, 832004, 1040005, 1664008, 2080010, 4160020, 8320040]

約数ペア:

[(1, 8320040), (2, 4160020), (4, 2080010), (5, 1664008), (8, 1040005), (10, 832004), (20, 416002), (40, 208001)]