1225000

素因数分解:

$2^3\times 5^5\times 7^2$

素因数の和:45

約数の個数: 72

約数和(自身を含む): 3339630

約数和(自身を除く): 2114630

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 49, 50, 56, 70, 98, 100, 125, 140, 175, 196, 200, 245, 250, 280, 350, 392, 490, 500, 625, 700, 875, 980, 1000, 1225, 1250, 1400, 1750, 1960, 2450, 2500, 3125, 3500, 4375, 4900, 5000, 6125, 6250, 7000, 8750, 9800, 12250, 12500, 17500, 21875, 24500, 25000, 30625, 35000, 43750, 49000, 61250, 87500, 122500, 153125, 175000, 245000, 306250, 612500, 1225000]

約数ペア:

[(1, 1225000), (2, 612500), (4, 306250), (5, 245000), (7, 175000), (8, 153125), (10, 122500), (14, 87500), (20, 61250), (25, 49000), (28, 43750), (35, 35000), (40, 30625), (49, 25000), (50, 24500), (56, 21875), (70, 17500), (98, 12500), (100, 12250), (125, 9800), (140, 8750), (175, 7000), (196, 6250), (200, 6125), (245, 5000), (250, 4900), (280, 4375), (350, 3500), (392, 3125), (490, 2500), (500, 2450), (625, 1960), (700, 1750), (875, 1400), (980, 1250), (1000, 1225)]