129740080

素因数分解:

$2^4\times 5^1\times {\mathrm{1621751}}^1$

素因数の和:1621764

約数の個数: 20

約数和(自身を含む): 301645872

約数和(自身を除く): 171905792

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1621751, 3243502, 6487004, 8108755, 12974008, 16217510, 25948016, 32435020, 64870040, 129740080]

約数ペア:

[(1, 129740080), (2, 64870040), (4, 32435020), (5, 25948016), (8, 16217510), (10, 12974008), (16, 8108755), (20, 6487004), (40, 3243502), (80, 1621751)]