GCF (HCF) of 1 and 12

"Greatest Common Factor" Calculator
Greatest Common Factor of
and

What is the Greatest Common Divisor of 1 and 12?

Answer

GCF (HCF) of 1 and 12 is
1

Common factors: 1

1 divides every number: the GCF with 1 is always 1, and the LCM is the other number itself — here 12.

1 — no prime factors

12 = 22 × 3

Prime112Lowest power
2—22—
3—3—

— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.

GCF = 1

More with these numbers

Related Calculations

See Also

GCF Table

Number 1Number 2GCF
111
141
151
161
171
181
191
1101
1121
1131
1161
1201
1271
1561
11001

FAQ

What is the Greatest Common Divisor of 1 and 12?

GCF (HCF) of 1 and 12 is 1

How to find the GCF of 1 and 12?

You can find the GCF of 1 and 12 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 1 and 12 is 1.

What prime factors do 1 and 12 share?

1 and 12 have no prime factor in common, so the only integer that divides both of them is 1 and their GCF is 1.

How does the GCF reduce the fraction 1/12?

Divide the numerator and the denominator by the GCF 1: 1 ÷ 1 = 1 and 12 ÷ 1 = 12. So 1/12 in lowest terms is 1/12.

Are 1 and 12 coprime?

Yes, 1 and 12 are coprime (relatively prime) because their Greatest Common Factor is 1.

See Also