GCF (HCF) of 105 and 170

"Greatest Common Factor" Calculator

What is the Greatest Common Divisor of 105 and 170?

Answer

GCF (HCF) of 105 and 170 is

Common factors: 1, 5

5 divides both: 105 ÷ 5 = 21, 170 ÷ 5 = 34 — and 21 and 34 share no factor but 1, so no larger number divides both.

105 = 3 × 5 × 7

170 = 2 × 5 × 17

Prime	105	170	Lowest power
2	—	2	—
3	3	—	—
5	5	5	5
7	7	—	—
17	—	17	—

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

GCF = 5

More with these numbers

Related Calculations

GCF Table

Number 1	Number 2	GCF
105	120	15
105	126	21
105	130	5
105	140	35
105	147	21
105	150	15
105	154	7
105	165	15
105	170	5
105	175	35
105	189	21
105	195	15
105	225	15
105	245	35
105	770	35

FAQ

What is the Greatest Common Divisor of 105 and 170?

GCF (HCF) of 105 and 170 is 5

How to find the GCF of 105 and 170?

You can find the GCF of 105 and 170 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 105 and 170 is 5.

What prime factors do 105 and 170 share?

The prime factorizations of 105 and 170 have 5 in common, and multiplying those shared primes gives 5 — exactly the greatest common factor.

How does the GCF reduce the fraction 105/170?

Divide the numerator and the denominator by the GCF 5: 105 ÷ 5 = 21 and 170 ÷ 5 = 34. So 105/170 in lowest terms is 21/34.

GCF (HCF) of 105 and 170

What is the Greatest Common Divisor of 105 and 170?

More with these numbers

Related Calculations

See Also

GCF Table

FAQ

What is the Greatest Common Divisor of 105 and 170?

How to find the GCF of 105 and 170?

What prime factors do 105 and 170 share?

How does the GCF reduce the fraction 105/170?

See Also

Number 1	Number 2	GCF
105	120	15
105	126	21
105	130	5
105	140	35
105	147	21
105	150	15
105	154	7
105	165	15
105	170	5
105	175	35
105	189	21
105	195	15
105	225	15
105	245	35
105	770	35

Number 1	Number 2	GCF
105	120	15
105	126	21
105	130	5
105	140	35
105	147	21
105	150	15
105	154	7
105	165	15
105	170	5
105	175	35
105	189	21
105	195	15
105	225	15
105	245	35
105	770	35

Number 1	Number 2	GCF
105	120	15
105	126	21
105	130	5
105	140	35
105	147	21
105	150	15
105	154	7
105	165	15
105	170	5
105	175	35
105	189	21
105	195	15
105	225	15
105	245	35
105	770	35