28000000

素因数分解:

$2^8\times 5^6\times 7^1$

素因数の和:53

約数の個数: 126

約数和(自身を含む): 79842728

約数和(自身を除く): 51842728

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, 256, 280, 320, 350, 400, 448, 500, 560, 625, 640, 700, 800, 875, 896, 1000, 1120, 1250, 1280, 1400, 1600, 1750, 1792, 2000, 2240, 2500, 2800, 3125, 3200, 3500, 4000, 4375, 4480, 5000, 5600, 6250, 6400, 7000, 8000, 8750, 8960, 10000, 11200, 12500, 14000, 15625, 16000, 17500, 20000, 21875, 22400, 25000, 28000, 31250, 32000, 35000, 40000, 43750, 44800, 50000, 56000, 62500, 70000, 80000, 87500, 100000, 109375, 112000, 125000, 140000, 160000, 175000, 200000, 218750, 224000, 250000, 280000, 350000, 400000, 437500, 500000, 560000, 700000, 800000, 875000, 1000000, 1120000, 1400000, 1750000, 2000000, 2800000, 3500000, 4000000, 5600000, 7000000, 14000000, 28000000]

約数ペア:

[(1, 28000000), (2, 14000000), (4, 7000000), (5, 5600000), (7, 4000000), (8, 3500000), (10, 2800000), (14, 2000000), (16, 1750000), (20, 1400000), (25, 1120000), (28, 1000000), (32, 875000), (35, 800000), (40, 700000), (50, 560000), (56, 500000), (64, 437500), (70, 400000), (80, 350000), (100, 280000), (112, 250000), (125, 224000), (128, 218750), (140, 200000), (160, 175000), (175, 160000), (200, 140000), (224, 125000), (250, 112000), (256, 109375), (280, 100000), (320, 87500), (350, 80000), (400, 70000), (448, 62500), (500, 56000), (560, 50000), (625, 44800), (640, 43750), (700, 40000), (800, 35000), (875, 32000), (896, 31250), (1000, 28000), (1120, 25000), (1250, 22400), (1280, 21875), (1400, 20000), (1600, 17500), (1750, 16000), (1792, 15625), (2000, 14000), (2240, 12500), (2500, 11200), (2800, 10000), (3125, 8960), (3200, 8750), (3500, 8000), (4000, 7000), (4375, 6400), (4480, 6250), (5000, 5600)]