1750000

素因数分解:

$2^4\times 5^6\times 7^1$

素因数の和:45

約数の個数: 70

約数和(自身を含む): 4843688

約数和(自身を除く): 3093688

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 35, 40, 50, 56, 70, 80, 100, 112, 125, 140, 175, 200, 250, 280, 350, 400, 500, 560, 625, 700, 875, 1000, 1250, 1400, 1750, 2000, 2500, 2800, 3125, 3500, 4375, 5000, 6250, 7000, 8750, 10000, 12500, 14000, 15625, 17500, 21875, 25000, 31250, 35000, 43750, 50000, 62500, 70000, 87500, 109375, 125000, 175000, 218750, 250000, 350000, 437500, 875000, 1750000]

約数ペア:

[(1, 1750000), (2, 875000), (4, 437500), (5, 350000), (7, 250000), (8, 218750), (10, 175000), (14, 125000), (16, 109375), (20, 87500), (25, 70000), (28, 62500), (35, 50000), (40, 43750), (50, 35000), (56, 31250), (70, 25000), (80, 21875), (100, 17500), (112, 15625), (125, 14000), (140, 12500), (175, 10000), (200, 8750), (250, 7000), (280, 6250), (350, 5000), (400, 4375), (500, 3500), (560, 3125), (625, 2800), (700, 2500), (875, 2000), (1000, 1750), (1250, 1400)]