The set of factors of 16 is={1,2,4,8,16}.So option(1) is correct
Natural numbers are those that start with 1 and go on indefinitely. In other words, natural numbers are counting numbers that do not include 0 or any negative or fractional numbers. Natural numbers are numbers like 1, 6, 89, 345, and so on.
What exactly are the factors?
A factor is a number that divides another number with no remainder. In other words, if multiplying two whole numbers results in a product, the multiplied numbers are factors of the product because the product is divisible by them. There are two methods for locating factors: multiplication and division.
Given in the question that, N is the set of natural numbers that are factors of 16
factors of 16 are = 1,2,4,8,16
so the set of factors of 16 is={1,2,4,8,16}
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