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The abc.txt contains a list of 0-255 triples, so it looks like pixel data. There is 528601 of them, so finding divisors shows up 929 x 569. Lets make such image:

```
from PIL import Image

with open('abc.txt') as f:
    content = f.read()

# abc is list of pixels (???)    
exec('abc = ' + content)

# width*height = len(abc) = 528601
width = 929
height = 569

img = Image.new("RGB", (width, height))
img.putdata(abc)
img.save("abc.png")
```