That number is 36.
The positive integer factors of 30 are: 1 2 3 5 6 10 15 30 The odd factors are therefore 1, 3, 5, 15
If you include 30, both 24 and and 30 have 8 factors, the most in that range.
28
An odd number of odd numbers can't add up to an even number.
31 and 37
No.
A number that has exactly an odd number of factors is a power of another number. A number between 10 and 30 that is a power is 16. It is 24 (as well as 42) and its factors are 1, 2, 4, 8, and 16.
23 is an odd number between 10 and 30 that gives a remainder of 2 when divided by 7.
The factors of a number cannot be greater than the number itself. So there are no factors of 4 between 30 and 50.
The positive integer factors of 30 are: 1 2 3 5 6 10 15 30 The odd factors are therefore 1, 3, 5, 15
15
Even number.
21, 23, 25, 27, 29
21 23 25 27 29
36 is a composite number between 30 and 40 because its factors are 1,2,3,4,6,9,12,18,36
Any number between 30 and 40 can be a factor. The common factors of 30 and 40 are 1, 2, 5 and 10.
If you mean 'prime' factors, then an odd number of them CAN'T produce a perfect square. Consider 3 factors ... A, B, and C. If their product were a perfect square, then AxB=C, which can't be true if C is a prime number. For non-prime factors, an odd number of them may or may not be a perfect square: Three factors = not a square: 2 x 3 x 5 = 30. Three factors = a square: 2 x 3 x 6 = 36.