20881704080

素因数分解:

$2^4\times 5^1\times {\mathrm{261021301}}^1$

素因数の和:261021314

約数の個数: 20

約数和(自身を含む): 48549962172

約数和(自身を除く): 27668258092

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 261021301, 522042602, 1044085204, 1305106505, 2088170408, 2610213010, 4176340816, 5220426020, 10440852040, 20881704080]

約数ペア:

[(1, 20881704080), (2, 10440852040), (4, 5220426020), (5, 4176340816), (8, 2610213010), (10, 2088170408), (16, 1305106505), (20, 1044085204), (40, 522042602), (80, 261021301)]