4900000

素因数分解:

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

素因数の和:49

約数の個数: 108

約数和(自身を含む): 14026446

約数和(自身を除く): 9126446

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, 3125, 3500, 3920, 4000, 4375, 4900, 5000, 5600, 6125, 6250, 7000, 7840, 8750, 9800, 10000, 12250, 12500, 14000, 17500, 19600, 20000, 21875, 24500, 25000, 28000, 30625, 35000, 39200, 43750, 49000, 50000, 61250, 70000, 87500, 98000, 100000, 122500, 140000, 153125, 175000, 196000, 245000, 306250, 350000, 490000, 612500, 700000, 980000, 1225000, 2450000, 4900000]

約数ペア:

[(1, 4900000), (2, 2450000), (4, 1225000), (5, 980000), (7, 700000), (8, 612500), (10, 490000), (14, 350000), (16, 306250), (20, 245000), (25, 196000), (28, 175000), (32, 153125), (35, 140000), (40, 122500), (49, 100000), (50, 98000), (56, 87500), (70, 70000), (80, 61250), (98, 50000), (100, 49000), (112, 43750), (125, 39200), (140, 35000), (160, 30625), (175, 28000), (196, 25000), (200, 24500), (224, 21875), (245, 20000), (250, 19600), (280, 17500), (350, 14000), (392, 12500), (400, 12250), (490, 10000), (500, 9800), (560, 8750), (625, 7840), (700, 7000), (784, 6250), (800, 6125), (875, 5600), (980, 5000), (1000, 4900), (1120, 4375), (1225, 4000), (1250, 3920), (1400, 3500), (1568, 3125), (1750, 2800), (1960, 2500), (2000, 2450)]