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What number between 40 and 60 has exactly three factors?
All prime squares have exactly three factors.49 has exactly three factors: 1, 7, and 49.
What number has exactly 3 factors and is greater than 40 and less than 60?
49 has exactly 3 factors (1, 7, and 49) and is greater than 40 and less than 60.
Why is 60 not a prime number?
Because a prime number is a number that has exactly two factors: 1 and itself. 60 has 12 factors: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60.
What is a whole number greater than 1 that is exactly two factors?
Any composite number. Examples: 4 and 9 . . . (three factors) 6, 8, and 10 . . . (four factors) 12 . . . (six factors) 60 . . . (twelve factors)
What is a number between 60 and 90 that has exactly two prime factors?
77 is one possibility.
Which number less than 100 has exactly 12 factors?
60, 72, 84, 90, and 96 each have 12 factors.
What is the smallest number with 11 factors?
1024 has exactly eleven. 60 has twelve, so it has eleven as well.
A number that has exactly two factors?
A prime number has exactly two factors.
What is the least positive integer that has exactly 13 factors?
4096 is the smallest number with exactly 13 factors. (Including 1 and itself as factors).192 is the smallest number with exactly 13 properfactors, (excluding the number itself).120 is the smallest number with at least 13 factors (it has 16 factors)To find the smallest number with exactly N factors (for example, N=12):Factor N into primes, (for example, 12= 2*2*3Subtract 1 from each of the prime factors (for example, 1,1,2)Sort them by largest first (for example, 2,1,1)Raise successive prime numbers to these powers (for example, 2^2,3^1,5^1)Multiply these together (for example: 4*3*5 = 60; 60 is the smallest number with exactly 12 factors).
What is the second lowest number with 10 factors?
48 has ten factors, 60 and 72 have twelve apiece, 80 is the next one with exactly ten.
What is the least number with exactly 8 factors?
The smallest number with exactly eight factors is 24.
What number has exactly 24 factors?
Well, If we looked at this way: (224) = 16777216, so this number has exactly 24 factors. (324) = 282429536481, so this number has exactly 24 factors. (510)(210)(34) = 810000000000, so this number has exactly 24 factors.
