# Find the GCF 21cd-3d

Find the GCF 21cd-3d
Since contain both numbers and variables, there are two steps to find the GCF (HCF). Find GCF for the numeric part then find GCF for the variable part.
Steps to find the GCF for :
1. Find the GCF for the numerical part
2. Find the GCF for the variable part
3. Multiply the values together
Find the common factors for the numerical part:
The factors for are .
The factors for are all numbers between and , which divide evenly.
Check numbers between and
Find the factor pairs of where .
List the factors for .
The factors for are .
The factors for are all numbers between and , which divide evenly.
Check numbers between and
Find the factor pairs of where .

List the factors for .
List all the factors for to find the common factors.
:
:
The common factors for are .
The GCF for the numerical part is .
Next, find the common factors for the variable part:
c,d,d
The factor for is itself.
c
The factor for is itself.
d
List all the factors for to find the common factors.
The common factor for the variables is .
d
The GCF for the variable part is .
Multiply the GCF of the numerical part and the GCF of the variable part .
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### Name

Name two billion seventeen million six hundred seventy thousand two hundred eighty-four

### Interesting facts

• 2017670284 has 32 divisors, whose sum is 5190599520
• The reverse of 2017670284 is 4820767102
• Previous prime number is 2437

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 37
• Digital Root 1

### Name

Name one billion nine hundred twelve million four hundred seventy-six thousand two hundred six

### Interesting facts

• 1912476206 has 8 divisors, whose sum is 2903277384
• The reverse of 1912476206 is 6026742191
• Previous prime number is 83

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 38
• Digital Root 2

### Name

Name eight hundred thirty-one million six hundred seventy-nine thousand one hundred forty-six

### Interesting facts

• 831679146 has 8 divisors, whose sum is 1386131940
• The reverse of 831679146 is 641976138
• Previous prime number is 9

### Basic properties

• Is Prime? no
• Number parity even
• Number length 9
• Sum of Digits 45
• Digital Root 9