code: def _greatest_common_factor(iterable) -> int:
      for f in range(max(iterable), 1, -1):
          if all(i % f == 0 for i in iterable):
              return f
      return 1
  
imports: from typing import Any, Callable, Dict, NoReturn, Optional, Tuple, Union
  import tensorflow
  from tensorflow_compression.python.layers import parameters
  from tensorflow_compression.python.ops import padding_ops
label_desc: Use image node_id 2 for calling a global function with example usage: _greatest_common_factor(iterable) and returns: int, f