980000

素因数分解:

$2^5\times 5^4\times 7^2$

素因数の和:44

約数の個数: 90

約数和(自身を含む): 2804571

約数和(自身を除く): 1824571

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 49, 50, 56, 70, 80, 98, 100, 112, 125, 140, 160, 175, 196, 200, 224, 245, 250, 280, 350, 392, 400, 490, 500, 560, 625, 700, 784, 800, 875, 980, 1000, 1120, 1225, 1250, 1400, 1568, 1750, 1960, 2000, 2450, 2500, 2800, 3500, 3920, 4000, 4375, 4900, 5000, 5600, 6125, 7000, 7840, 8750, 9800, 10000, 12250, 14000, 17500, 19600, 20000, 24500, 28000, 30625, 35000, 39200, 49000, 61250, 70000, 98000, 122500, 140000, 196000, 245000, 490000, 980000]

約数ペア:

[(1, 980000), (2, 490000), (4, 245000), (5, 196000), (7, 140000), (8, 122500), (10, 98000), (14, 70000), (16, 61250), (20, 49000), (25, 39200), (28, 35000), (32, 30625), (35, 28000), (40, 24500), (49, 20000), (50, 19600), (56, 17500), (70, 14000), (80, 12250), (98, 10000), (100, 9800), (112, 8750), (125, 7840), (140, 7000), (160, 6125), (175, 5600), (196, 5000), (200, 4900), (224, 4375), (245, 4000), (250, 3920), (280, 3500), (350, 2800), (392, 2500), (400, 2450), (490, 2000), (500, 1960), (560, 1750), (625, 1568), (700, 1400), (784, 1250), (800, 1225), (875, 1120), (980, 1000)]