128394280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{19937}}^1$

素因数の和:19978

約数の個数: 64

約数和(自身を含む): 344528640

約数和(自身を除く): 216134360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 56, 70, 92, 115, 140, 161, 184, 230, 280, 322, 460, 644, 805, 920, 1288, 1610, 3220, 6440, 19937, 39874, 79748, 99685, 139559, 159496, 199370, 279118, 398740, 458551, 558236, 697795, 797480, 917102, 1116472, 1395590, 1834204, 2292755, 2791180, 3209857, 3668408, 4585510, 5582360, 6419714, 9171020, 12839428, 16049285, 18342040, 25678856, 32098570, 64197140, 128394280]

約数ペア:

[(1, 128394280), (2, 64197140), (4, 32098570), (5, 25678856), (7, 18342040), (8, 16049285), (10, 12839428), (14, 9171020), (20, 6419714), (23, 5582360), (28, 4585510), (35, 3668408), (40, 3209857), (46, 2791180), (56, 2292755), (70, 1834204), (92, 1395590), (115, 1116472), (140, 917102), (161, 797480), (184, 697795), (230, 558236), (280, 458551), (322, 398740), (460, 279118), (644, 199370), (805, 159496), (920, 139559), (1288, 99685), (1610, 79748), (3220, 39874), (6440, 19937)]