8720000

素因数分解:

$2^7\times 5^4\times {\mathrm{109}}^1$

素因数の和:143

約数の個数: 80

約数和(自身を含む): 21907050

約数和(自身を除く): 13187050

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 109, 125, 128, 160, 200, 218, 250, 320, 400, 436, 500, 545, 625, 640, 800, 872, 1000, 1090, 1250, 1600, 1744, 2000, 2180, 2500, 2725, 3200, 3488, 4000, 4360, 5000, 5450, 6976, 8000, 8720, 10000, 10900, 13625, 13952, 16000, 17440, 20000, 21800, 27250, 34880, 40000, 43600, 54500, 68125, 69760, 80000, 87200, 109000, 136250, 174400, 218000, 272500, 348800, 436000, 545000, 872000, 1090000, 1744000, 2180000, 4360000, 8720000]

約数ペア:

[(1, 8720000), (2, 4360000), (4, 2180000), (5, 1744000), (8, 1090000), (10, 872000), (16, 545000), (20, 436000), (25, 348800), (32, 272500), (40, 218000), (50, 174400), (64, 136250), (80, 109000), (100, 87200), (109, 80000), (125, 69760), (128, 68125), (160, 54500), (200, 43600), (218, 40000), (250, 34880), (320, 27250), (400, 21800), (436, 20000), (500, 17440), (545, 16000), (625, 13952), (640, 13625), (800, 10900), (872, 10000), (1000, 8720), (1090, 8000), (1250, 6976), (1600, 5450), (1744, 5000), (2000, 4360), (2180, 4000), (2500, 3488), (2725, 3200)]