ALL of the numbers between 1 and 100 are rectangular numbers,
except for 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53,
59, 61, 67, 71, 73, 79, 83, 89, and 97.
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There are 49 numbers between 1 and 100 that are divisible by two.
101
33 numbers between 1 and 100 are divisible by 3.
Not including 1 and 100, 99
4, 9, 25, and 49 are all of the numbers between 1 and 100 having 3 factors.