The GCF is 7.
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The GCF is 1.
The highest common factor for 133 and 161 is 7.
There are 13 : 105, 112, 119, 126, 133, 140, 147, 154, 161, 168, 175, 182, 189.
It's 105.Or maybe it's 119 or 133.Or it could even be 147, 161, 175, or 189.
The Least Common Multiple (LCM) of 23 and 7 is 161.