2800000

素因数分解:

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

素因数の和:46

約数の個数: 96

約数和(自身を含む): 7968240

約数和(自身を除く): 5168240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 50, 56, 64, 70, 80, 100, 112, 125, 128, 140, 160, 175, 200, 224, 250, 280, 320, 350, 400, 448, 500, 560, 625, 640, 700, 800, 875, 896, 1000, 1120, 1250, 1400, 1600, 1750, 2000, 2240, 2500, 2800, 3125, 3200, 3500, 4000, 4375, 4480, 5000, 5600, 6250, 7000, 8000, 8750, 10000, 11200, 12500, 14000, 16000, 17500, 20000, 21875, 22400, 25000, 28000, 35000, 40000, 43750, 50000, 56000, 70000, 80000, 87500, 100000, 112000, 140000, 175000, 200000, 280000, 350000, 400000, 560000, 700000, 1400000, 2800000]

約数ペア:

[(1, 2800000), (2, 1400000), (4, 700000), (5, 560000), (7, 400000), (8, 350000), (10, 280000), (14, 200000), (16, 175000), (20, 140000), (25, 112000), (28, 100000), (32, 87500), (35, 80000), (40, 70000), (50, 56000), (56, 50000), (64, 43750), (70, 40000), (80, 35000), (100, 28000), (112, 25000), (125, 22400), (128, 21875), (140, 20000), (160, 17500), (175, 16000), (200, 14000), (224, 12500), (250, 11200), (280, 10000), (320, 8750), (350, 8000), (400, 7000), (448, 6250), (500, 5600), (560, 5000), (625, 4480), (640, 4375), (700, 4000), (800, 3500), (875, 3200), (896, 3125), (1000, 2800), (1120, 2500), (1250, 2240), (1400, 2000), (1600, 1750)]