GCF and LCM of 9
Every pair this site works through that contains 9. 17 of them share a factor with it; 13 share nothing, which is its own kind of answer.
Shares a factor with 9
Shares nothing with 9
What 9 is made of
Every common factor 9 can share with anything comes from this list, which is why the pairs below look the way they do. 9 = 3², and that factorisation is unique — the fundamental theorem of arithmetic guarantees no other set of primes multiplies to it.
- Divisors (3)
- 1, 3, 9
- As factor pairs
- 1×9, 3×3
- Prime factorisation
- 3²
- Divisors excluding itself add to
- 4 — deficient
9 is a perfect square, so it has an odd number of divisors — the square root pairs with itself. The greatest common factor of 9 and any other number is the largest entry two lists like this one share.