4375000

素因数分解:

$2^3\times 5^7\times 7^1$

素因数の和:48

約数の個数: 64

約数和(自身を含む): 11718720

約数和(自身を除く): 7343720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 50, 56, 70, 100, 125, 140, 175, 200, 250, 280, 350, 500, 625, 700, 875, 1000, 1250, 1400, 1750, 2500, 3125, 3500, 4375, 5000, 6250, 7000, 8750, 12500, 15625, 17500, 21875, 25000, 31250, 35000, 43750, 62500, 78125, 87500, 109375, 125000, 156250, 175000, 218750, 312500, 437500, 546875, 625000, 875000, 1093750, 2187500, 4375000]

約数ペア:

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