20648080

素因数分解:

$2^4\times 5^1\times {\mathrm{258101}}^1$

素因数の和:258114

約数の個数: 20

約数和(自身を含む): 48006972

約数和(自身を除く): 27358892

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258101, 516202, 1032404, 1290505, 2064808, 2581010, 4129616, 5162020, 10324040, 20648080]

約数ペア:

[(1, 20648080), (2, 10324040), (4, 5162020), (5, 4129616), (8, 2581010), (10, 2064808), (16, 1290505), (20, 1032404), (40, 516202), (80, 258101)]