20 is.
The GCF is 5.
The highest factor of what? The highest factor of 100 is 100.
The greatest common factor of ten and twenty is ten.
The highest factor of 72 is 72.
36 is the highest factor of 36.
The highest factor of 763 is: 763
Hence the last digits of both 23 and twenty 29 are divisible by three, the whole number is divisible by three, so the highest common factor of both 23 an 29 the answer is 3.
Highest prime factor, indeed only prime factor, is 5
Every number is the highest factor of itself.
The highest factor of any number is the number itself.
Highest common factor is 7.
The Highest Common Factor is: 9