I have a doubt in questions where we are asked to find the number of distinct factors of a number.
Do we have to consider the total number of factors which are positive factors + negative factors or only the positive factors?
Q. Distinct prime factors of 36
Positive factors: 9
Negative factors: 9
So is the answer to the question be 9 or 18 ?
Can the factors be negative or they are always positive?
Factors are always positive.
No of distinct prime factors of 36 is 2 (they are 2 and 3)
No of distinct factors of 36 is 9.
Multiple can be positive/0/negative.
There are infinite multiples of any integer e.g. multiples of 36 are 36, 72, 0, -36, -72 etc.
0 is a multiple of every number.
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