16640080

素因数分解:

$2^4\times 5^1\times {\mathrm{208001}}^1$

素因数の和:208014

約数の個数: 20

約数和(自身を含む): 38688372

約数和(自身を除く): 22048292

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 208001, 416002, 832004, 1040005, 1664008, 2080010, 3328016, 4160020, 8320040, 16640080]

約数ペア:

[(1, 16640080), (2, 8320040), (4, 4160020), (5, 3328016), (8, 2080010), (10, 1664008), (16, 1040005), (20, 832004), (40, 416002), (80, 208001)]