19904000

素因数分解:

$2^9\times 5^3\times {\mathrm{311}}^1$

素因数の和:344

約数の個数: 80

約数和(自身を含む): 49791456

約数和(自身を除く): 29887456

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 256, 311, 320, 400, 500, 512, 622, 640, 800, 1000, 1244, 1280, 1555, 1600, 2000, 2488, 2560, 3110, 3200, 4000, 4976, 6220, 6400, 7775, 8000, 9952, 12440, 12800, 15550, 16000, 19904, 24880, 31100, 32000, 38875, 39808, 49760, 62200, 64000, 77750, 79616, 99520, 124400, 155500, 159232, 199040, 248800, 311000, 398080, 497600, 622000, 796160, 995200, 1244000, 1990400, 2488000, 3980800, 4976000, 9952000, 19904000]

約数ペア:

[(1, 19904000), (2, 9952000), (4, 4976000), (5, 3980800), (8, 2488000), (10, 1990400), (16, 1244000), (20, 995200), (25, 796160), (32, 622000), (40, 497600), (50, 398080), (64, 311000), (80, 248800), (100, 199040), (125, 159232), (128, 155500), (160, 124400), (200, 99520), (250, 79616), (256, 77750), (311, 64000), (320, 62200), (400, 49760), (500, 39808), (512, 38875), (622, 32000), (640, 31100), (800, 24880), (1000, 19904), (1244, 16000), (1280, 15550), (1555, 12800), (1600, 12440), (2000, 9952), (2488, 8000), (2560, 7775), (3110, 6400), (3200, 6220), (4000, 4976)]