The perfect numbers under forty are 6 and 28.
No - forty is not a perfect number. A perfect number is a number equal to the sum of all its factors apart from itself. The closest perfect numbers to 40 in each direction are: lower: 28 higher: 496
The factors of 48 are 1,2,3,4,6,8,12,16,24,48
All numbers have factors. Some factors are perfect squares. We call these perfect square factors. 9 is a perfect square factor of 27.
16
They are 1 and 47.
6 and 28
16
1, 7 and 49.
46 = 2x23
48 does.
No.
A perfect square has an odd number of factors. Factors of numbers always come in pairs -- except for perfect squares. Since the square root of a perfect square is listed only once on the list of factors, it results in a list with an odd number of factors.