The highest common factor is 1. Since 13 is a prime number - its only factors are 1 and itself. 13 is not a factor of 45.
The hcf of 45 and 40 is 5.
HCF(315, 720) = 45
The HCF is 1.
The GCF is 1.
HCF(26, 45) = 1. The numbers are co-prime.
The GCF is 15.
The GCF is 13.
The GCF is 5.
The GCF is 15.
45
9
15