204080

素因数分解:

$2^4\times 5^1\times {\mathrm{2551}}^1$

素因数の和:2564

約数の個数: 20

約数和(自身を含む): 474672

約数和(自身を除く): 270592

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2551, 5102, 10204, 12755, 20408, 25510, 40816, 51020, 102040, 204080]

約数ペア:

[(1, 204080), (2, 102040), (4, 51020), (5, 40816), (8, 25510), (10, 20408), (16, 12755), (20, 10204), (40, 5102), (80, 2551)]