Since 7 is a prime, 7*1 = 7, so that the only possibility for a number to have 7 factors is to have only one prime factor to the power of 6, because 7 = 1 + 6.
64 = 26 = 7 factors (6 + 1) (2 is the smallest Prime number)
Since 36 > 100, then 64 is the only number between 0 and 100 that have 7 factors.
There are a total of 14 numbers between 0 & 100 that are divisible by 7.
100 ÷ 4 = 25 → 24 numbers between 0 and 100 exclusive are divisible by 4 100 ÷ 6 = 16 2/3 → 16 numbers between 0 and 100 are divisible by 6 lcm(4, 6) = 12 → 100 ÷ 12 = 8 1/3 → 8 numbers between 0 and 100 are divisible by 4 and 6.
100
There are 19 numbers between zero and 365 that have an odd number of factors.
There are 8 square numbers between 0 and 100. 4, 9, 16, 25, 36, 49, 64, 81
50
There are 99 numbers between 0 and 100.
60, 72, 84, 90 and 96
60, 72, 84, 90 and 96 each have twelve factors.
100
They are the numbers that have two or more factors whereas prime numbers have only two factors.
There are a total of 14 numbers between 0 & 100 that are divisible by 7.
Since 100/4 = 25, there are 25 numbers between 0 and 100 divisible by 4.
prime numbers between 0 -100 which are divisible by 7: 7
100 ÷ 4 = 25 → 24 numbers between 0 and 100 exclusive are divisible by 4 100 ÷ 6 = 16 2/3 → 16 numbers between 0 and 100 are divisible by 6 lcm(4, 6) = 12 → 100 ÷ 12 = 8 1/3 → 8 numbers between 0 and 100 are divisible by 4 and 6.
There are 25 prime numbers between 0 and 100.
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