2180000

素因数分解:

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

素因数の和:139

約数の個数: 60

約数和(自身を含む): 5412330

約数和(自身を除く): 3232330

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 109, 125, 160, 200, 218, 250, 400, 436, 500, 545, 625, 800, 872, 1000, 1090, 1250, 1744, 2000, 2180, 2500, 2725, 3488, 4000, 4360, 5000, 5450, 8720, 10000, 10900, 13625, 17440, 20000, 21800, 27250, 43600, 54500, 68125, 87200, 109000, 136250, 218000, 272500, 436000, 545000, 1090000, 2180000]

約数ペア:

[(1, 2180000), (2, 1090000), (4, 545000), (5, 436000), (8, 272500), (10, 218000), (16, 136250), (20, 109000), (25, 87200), (32, 68125), (40, 54500), (50, 43600), (80, 27250), (100, 21800), (109, 20000), (125, 17440), (160, 13625), (200, 10900), (218, 10000), (250, 8720), (400, 5450), (436, 5000), (500, 4360), (545, 4000), (625, 3488), (800, 2725), (872, 2500), (1000, 2180), (1090, 2000), (1250, 1744)]