Just 1.
1, 2, 13, 26.
26 = 2 x 13
Factors of 39: 1, 3, 13, 39 Factors of 26: 1, 2, 13, 26 Common factors: 1, 13.
Any of its factors which are: 1 2 13 and 26
26 can go into 115 four times with a remainder of 11.
1 and 11 (11 is a prime number).
11 is a prime number, so the factors are 1 and 11
The general factors or divisors of 187 are 187, 17, 11 and 1. The prime factors are 11 and 17.
The factors of 11 are 1, 11. 11 is prime because its only factors are 1 and 11 (itself.)
26 \
11 with remainder 12.
11 with remainder 26.