8750000

素因数分解:

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

素因数の和:50

約数の個数: 80

約数和(自身を含む): 24218688

約数和(自身を除く): 15468688

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, 78125, 87500, 109375, 125000, 156250, 175000, 218750, 250000, 312500, 350000, 437500, 546875, 625000, 875000, 1093750, 1250000, 1750000, 2187500, 4375000, 8750000]

約数ペア:

[(1, 8750000), (2, 4375000), (4, 2187500), (5, 1750000), (7, 1250000), (8, 1093750), (10, 875000), (14, 625000), (16, 546875), (20, 437500), (25, 350000), (28, 312500), (35, 250000), (40, 218750), (50, 175000), (56, 156250), (70, 125000), (80, 109375), (100, 87500), (112, 78125), (125, 70000), (140, 62500), (175, 50000), (200, 43750), (250, 35000), (280, 31250), (350, 25000), (400, 21875), (500, 17500), (560, 15625), (625, 14000), (700, 12500), (875, 10000), (1000, 8750), (1250, 7000), (1400, 6250), (1750, 5000), (2000, 4375), (2500, 3500), (2800, 3125)]