1280080

素因数分解:

$2^4\times 5^1\times {\mathrm{16001}}^1$

素因数の和:16014

約数の個数: 20

約数和(自身を含む): 2976372

約数和(自身を除く): 1696292

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 16001, 32002, 64004, 80005, 128008, 160010, 256016, 320020, 640040, 1280080]

約数ペア:

[(1, 1280080), (2, 640040), (4, 320020), (5, 256016), (8, 160010), (10, 128008), (16, 80005), (20, 64004), (40, 32002), (80, 16001)]