These are the numbers and their factors.
60 (1,2,3,4,5,6,10,12,15,20,30,60)
72 (1,2,3,4,6,8,9,12,18,24,36,72)
84 (1,2,3,4,6,7,12,14,21,28,42,84)
90 (1,2,3,5,6,9,10,15,18,30,45,90)
96 (1,2,3,4,6,8,12,16,24,32,48,96)
Note : If you learn about number theory then the value of the exponents of the prime factors enables you to determine the number of factors.
For example : 60 = 22 x 3 x 5 = 22 x 31 x 51
Add 1 to the value of each exponent and obtain the product.
(2 + 1)(1 + 1)(1 + 1) = 3 x 2 x 2 = 12 ....which is the number of factors of 60.
Just 32.
Just 36.
All even numbers greater than 2 have even proper factors, since they all have 2 as a proper factor.
By definition, a prime number has exactly two factors. So, there are no prime numbers with exactly three factors.
There are 25 prime numbers less than 100
11,22,33,44,55,66,77,88,99
10,20,30,40,50,60,70,80,90
99 is one of them and all other numbers less than 100 that have more than two factors in them.
Square numbers, like 36 and 64.
Just 32.
23468912161824273236485464728196
99, but that's probably not what you want to know. There are 21 factors of 360 that are less than 100.
All of the numbers less than 100 (except for -1, 0 and 1) have prime factors. I suspect you left some qualifying information out of your question.
All whole numbers less than 100 (except 0 ) have eight or more factors ( 1 = 1x1x1x1x1x1x1x1 and so on). But I'm assuming you're trying to asking the same question except with a 'prime' infront of factors. The answer is zero as if we consider the smallest prime no. viz 2, multiply it 8 times (=256) is greater than 100.Hence, zero whole numbers less than 100 have eight or more prime factors.
4, 9, 25, 49
20, 40, 60, 80
Just 36.