You can't have the greatest common factor of just one number - for it to be common there needs to be at least 2 numbers.
The GCF is 1.
479 is the GCF of 479 and 958.
A single number cannot have a greatest common factor because "common" refers to factors that two or more numbers have in common. You have only one, which is 479. Also, only one number can be the greatest.
The 2 smallest numbers that have GCF of 479 are 479 and 958.479 x 1 = 479479 x 2 = 958
479 and 958, among others.
479 and 958 have a GCF of 479.
479 and 958 is one possibility.
958 and 1437 is one possibility.
479 and 958
If the GCF of two numbers is 850, both numbers are multiples of 850. Multiples of 850 include 850, 1700, 2250 and so on. The smallest two numbers that have a GCF of 850 are 850 and 1700. But 1700 is divisible by 850. 1700 and 2250 are the next two smallest and are not divisible by each other.
We suspect there's an infinite number of correct answers. Here's one: 479 and 958
958+200 = 1158