There are infinitely many numbers between 39 and 100.
1. The two numbers are coprime.
1, 3, 13, 39.
1, 3, 13, 39.
The HCF of 39 and 20 is 1
1,3,13 and 39 are all the numbers that go into 39.
Excluding 22 and 100, there are 39
13
The prime factors of 39 are 3 and 13.
39*3=117 39*5=195
2+29+69 = 100 2+39+59 = 100 .... A pattern emerges.
1 and 13.