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The greatest factor of any positive integer is the number itself.
The greatest factor of any single positive number is the number itself. The GCF of 20 and 30 is 10.
The greatest factor of a single term is the term itself.
"war power" The right for a government to protect itself is the single greatest authority given to a national government.
You need at least two numbers to find a GCF.
The ratio of a single number is the number itself.
The mean of a single number is the number itself!
The average of a single number is itself.
"Common multiples" is usually used for two or more numbers, not for a single number. The least common multiple of a single number is, of course, the number itself. To get additional multiples, multiply this least common multiple by 2, by 3, by 4, etc.
The average for a single number, such as 859284859695 is the number itself.
The mean of a single number, such as 121317, is the number itself.
The mean of a single number, such as 444455566777778899910101010, is the number itself.