Yes.
If you mean factor pairs then I know: Factor pairs and factors are both same things and for example this is a factor pair: 4x5, 6x5, 7x5. Factors or factor pairs is an equation that equals to a total: for example: factors of 20: 5x4, 4x5. BONUS: If one number has 2 or more factor pairs then that is a composite. If a number only has below and 2 that is a prime number.
Prime numbers have one factor pair. Composite numbers have two or more pairs. (6,8) and (4,12) are two different factor pairs for 48.
By grouping. Sometimes group 3 terms and factor them as trimonial them see if you can do more with the last term. sometimes you group them into pairs and factor the pairs, then see if you can do more.
No. The Maximum Factor for any number that is less than itself can be only 50% of its value.
30
Five
Any number is a factor and a multiple of itself. Other factors are less than the number, other multiples are more. 5 is a factor of 10. 10 is a multiple of 5.
Twenty only has three factor pairs. (20,1)(10,2)(5,4)
A number that is a factor of two or more numbers is simply a common factor
Apart from [1,201], [3,67] is the only other factor pair. Since both 3 and 67 are prime numbers, you know you won't be able to find any more factor pairs.
That's not necessarily enough information. The original numbers will be another factor pair of the product of the GCF and LCM. If that number has more than two factor pairs, more information will be required.