GCF for 81 and 162

"Greatest Common Factor" Calculator

What is the Greatest common Divisor of 81 and 162?

Answer: GCF of 81 and 162 is 81

(Eighty-one)

Finding GCF for 81 and 162 using all factors (divisors) listing

The first method to find GCF for numbers 81 and 162 is to list all factors for both numbers and pick the highest common one:

All factors of 81: 1, 3, 9, 27, 81

All factors of 162: 1, 2, 3, 6, 9, 18, 27, 54, 81, 162

So the Greatest Common Factor for 81 and 162 is 81

Finding GCF for 81 and 162 by Prime Factorization

The second method to find GCF for numbers 81 and 162 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 81: 3, 3, 3, 3

All Prime Factors of 162: 2, 3, 3, 3, 3

As we can see there are Prime Factors common to both numbers: 3, 3, 3, 3

Now we need to multiply them to find GCF: 3 × 3 × 3 × 3 = 81

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What is the GCF of 81 and 162. Find the GCF (GCD) of 162 and 81 - the biggest number that can divide two integers.

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GCF Table

Number 1	Number 2	GCF
66	162	6
67	162	1
68	162	2
69	162	3
70	162	2
71	162	1
72	162	18
73	162	1
74	162	2
75	162	3
76	162	2
77	162	1
78	162	6
79	162	1
80	162	2
81	162	81
82	162	2
83	162	1
84	162	6
85	162	1
86	162	2
87	162	3
88	162	2
89	162	1
90	162	18
91	162	1
92	162	2
93	162	3
94	162	2
95	162	1

About "Greatest Common Factor" Calculator

This calculator will help you find the greatest common factor (GCF) of two numbers. For example, it can help you find out what is the Greatest common Divisor of 81 and 162? (The answer is: 81). Select the first number (e.g. '81') and the second number (e.g. '162'). After that hit the 'Calculate' button.

Greatest Common Factor (GCF) also known as the Greatest Common Divisor (GCD) or Highest Common Factor (HCF) - it is the largest positive integer that divides each of the integers with zero remainder

Number 1	Number 2	GCF
66	162	6
67	162	1
68	162	2
69	162	3
70	162	2
71	162	1
72	162	18
73	162	1
74	162	2
75	162	3
76	162	2
77	162	1
78	162	6
79	162	1
80	162	2
81	162	81
82	162	2
83	162	1
84	162	6
85	162	1
86	162	2
87	162	3
88	162	2
89	162	1
90	162	18
91	162	1
92	162	2
93	162	3
94	162	2
95	162	1

Number 1	Number 2	GCF
66	162	6
67	162	1
68	162	2
69	162	3
70	162	2
71	162	1
72	162	18
73	162	1
74	162	2
75	162	3
76	162	2
77	162	1
78	162	6
79	162	1
80	162	2
81	162	81
82	162	2
83	162	1
84	162	6
85	162	1
86	162	2
87	162	3
88	162	2
89	162	1
90	162	18
91	162	1
92	162	2
93	162	3
94	162	2
95	162	1

GCF for 81 and 162

What is the Greatest common Divisor of 81 and 162?

Finding GCF for 81 and 162 using all factors (divisors) listing

Finding GCF for 81 and 162 by Prime Factorization

GCF Table

About "Greatest Common Factor" Calculator

"Greatest Common Factor" Calculator

FAQ

What is the Greatest common Divisor of 81 and 162?

Number 1	Number 2	GCF
66	162	6
67	162	1
68	162	2
69	162	3
70	162	2
71	162	1
72	162	18
73	162	1
74	162	2
75	162	3
76	162	2
77	162	1
78	162	6
79	162	1
80	162	2
81	162	81
82	162	2
83	162	1
84	162	6
85	162	1
86	162	2
87	162	3
88	162	2
89	162	1
90	162	18
91	162	1
92	162	2
93	162	3
94	162	2
95	162	1