The product of the prime factors of 218 is 218.
The prime factors of 218 are 2 and 109, making their product 2 x 109 = 218!
I wouldn't expect it to be otherwise: the product of the prime factors of a number equal the number.
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Every number is divisible by any non-zero number.
Any element of the set of numbers of the form 208*k where k is an integer is evenly divisible.
Because they divide evenly into 396 with no remainder.
The factors of 18 are 1, 2, 3, 6, 9, 18 because those are the only integers that divide evenly into 18 with no remainder.
Not necessarily. 8 is a multiple but it does not divide evenly into 5.
Six is a divisor of 18 because it divides evenly into 18. Another name for divisor is 'factor'.
The lowest common factor of any set of integers is 1.