15840400

素因数分解:

$2^4\times 5^2\times {\mathrm{199}}^2$

素因数の和:416

約数の個数: 45

約数和(自身を含む): 38248761

約数和(自身を除く): 22408361

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 199, 200, 398, 400, 796, 995, 1592, 1990, 3184, 3980, 4975, 7960, 9950, 15920, 19900, 39601, 39800, 79202, 79600, 158404, 198005, 316808, 396010, 633616, 792020, 990025, 1584040, 1980050, 3168080, 3960100, 7920200, 15840400]

約数ペア:

[(1, 15840400), (2, 7920200), (4, 3960100), (5, 3168080), (8, 1980050), (10, 1584040), (16, 990025), (20, 792020), (25, 633616), (40, 396010), (50, 316808), (80, 198005), (100, 158404), (199, 79600), (200, 79202), (398, 39800), (400, 39601), (796, 19900), (995, 15920), (1592, 9950), (1990, 7960), (3184, 4975)]