Amicable Pairs with Common Factor 3/Mistake

Source Work

 * The Dictionary
 * $220$
 * $220$

Mistake

 * Most known amicable pairs have both numbers in the pair divisible by $3$.

There is a crucial word missing out here. This should read:
 * Most known odd amicable pairs have both numbers in the pair divisible by $3$.

It is known that amicable pairs whose elements are both even cannot have either element divisible by $3$.