128217800

素因数分解:

$2^3\times 5^2\times {\mathrm{641089}}^1$

素因数の和:641105

約数の個数: 24

約数和(自身を含む): 298106850

約数和(自身を除く): 169889050

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 641089, 1282178, 2564356, 3205445, 5128712, 6410890, 12821780, 16027225, 25643560, 32054450, 64108900, 128217800]

約数ペア:

[(1, 128217800), (2, 64108900), (4, 32054450), (5, 25643560), (8, 16027225), (10, 12821780), (20, 6410890), (25, 5128712), (40, 3205445), (50, 2564356), (100, 1282178), (200, 641089)]