GCF and LCM of 2
Every pair this site works through that contains 2. 24 of them share a factor with it; 9 share nothing, which is its own kind of answer.
Shares a factor with 2
Shares nothing with 2
What 2 is made of
Every common factor 2 can share with anything comes from this list, which is why the pairs below look the way they do. 2 is prime: its only divisors are 1 and itself, so it shares a factor with another number only when that number is a multiple of it.
- Divisors (2)
- 1, 2
- As factor pairs
- 1×2
- Prime factorisation
- prime
- Divisors excluding itself add to
- 1 — deficient
Divisors come in pairs that multiply to 2, which is why there is an even number of them unless the number is a perfect square. The greatest common factor of 2 and any other number is the largest entry two lists like this one share.