1990400

素因数分解:

$2^8\times 5^2\times {\mathrm{311}}^1$

素因数の和:337

約数の個数: 54

約数和(自身を含む): 4942392

約数和(自身を除く): 2951992

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 311, 320, 400, 622, 640, 800, 1244, 1280, 1555, 1600, 2488, 3110, 3200, 4976, 6220, 6400, 7775, 9952, 12440, 15550, 19904, 24880, 31100, 39808, 49760, 62200, 79616, 99520, 124400, 199040, 248800, 398080, 497600, 995200, 1990400]

約数ペア:

[(1, 1990400), (2, 995200), (4, 497600), (5, 398080), (8, 248800), (10, 199040), (16, 124400), (20, 99520), (25, 79616), (32, 62200), (40, 49760), (50, 39808), (64, 31100), (80, 24880), (100, 19904), (128, 15550), (160, 12440), (200, 9952), (256, 7775), (311, 6400), (320, 6220), (400, 4976), (622, 3200), (640, 3110), (800, 2488), (1244, 1600), (1280, 1555)]