GCF and LCM of 5 and 16
The greatest common factor and least common multiple of 5 and 16.
GCF of 5 and 16
1
LCM of 5 and 16
80
How it works
Break each number into its prime factors:
- 5 = 5
- 16 = 2⁴
The GCF (1) multiplies the primes both share, at the lowest power each appears. The LCM (80) multiplies every prime that appears in either number, at the highest power — which is also 5 × 16 ÷ 1 = 80.
Try other numbers
Need a different pair? The LCM & GCF calculator computes the GCF and LCM for any two numbers.
Related pairs
Frequently asked questions
What is the GCF of 5 and 16?+
The greatest common factor (GCF) of 5 and 16 is 1 — the largest number that divides both 5 and 16 with no remainder.
What is the LCM of 5 and 16?+
The least common multiple (LCM) of 5 and 16 is 80 — the smallest number that both 5 and 16 divide into. It equals 5 × 16 ÷ GCF = 80 ÷ 1 = 80.