20080

素因数分解:

$2^4\times 5^1\times {\mathrm{251}}^1$

素因数の和:264

約数の個数: 20

約数和(自身を含む): 46872

約数和(自身を除く): 26792

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251, 502, 1004, 1255, 2008, 2510, 4016, 5020, 10040, 20080]

約数ペア:

[(1, 20080), (2, 10040), (4, 5020), (5, 4016), (8, 2510), (10, 2008), (16, 1255), (20, 1004), (40, 502), (80, 251)]