Factoring can be simple. In order to find the factors of a number, a person finds all the numbers that divide into the number evenly.
The factors are 1, 2, 3, 6, 9, 18 To find something in common, you need another set of factors to compare these to.
find all factors of 61
You need at least two numbers to find something in common between them.
You might have meant to write something after the a, but as written, the factors of a are 1 and a.
find all factors of 72
Once all the prime factors of a number have been found, the number of factors the number has and what they are can be found. I'd be finding the prime factors first before finding all the factors of a number, so I'd rather find all the prime factors as it means I can stop before I have to do more work in finding all the factors.
You have to multiply something by something else to get a product. All numbers have factors in pairs.
You could. All of the factors of 100 are factors of 200.
All of them. Different numbers have different numbers of factors.
1,2,3,6,9,18
1,3,9,13,39,117
90