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Do all numbers have an even number of factors?
No. Perfect square numbers have an odd number of factors.
What type of number has a n odd number of factors?
all perfect square numbers
What are perfact numbers?
If the sum of all a number's factors (factors that are smaller than the number itself) is equal to the number itself, the number is said to be "perfect". For example, the factors of 6 (excluding 6 itself) are 1, 2, and 3; and the sum of these numbers is exactly 6. The smallest perfect numbers are 6, 28, 496, 8128. It isn't known whether the set of perfect numbers is finite or infinite. Also, it isn't known whether there are any odd perfect number; all known perfect numbers are even.
What numbers always have an even number of factors?
All positive integers which are not perfect squares.
Are all multiples of abundant numbers abundant?
Yes, this is well known. All integral multiples of any perfect, or abundant number must be an abundant number.
Do all numbers have an even number of factors?
No. Perfect square numbers have an odd number of factors.
Is 31 a perfect number?
No. The only perfect numbers less than 100 are 6 and 28. All known perfect numbers are even - it is unknown whether there are odd perfect numbers.
Is it possible for a prime number to be a perfect number and why?
No, all prime numbers are deficient.
What are all the almost perfect numbers?
An almost perfect number is a natural number n such that the sum of all divisors of n is equal to 2n - 1.
What type of number has a n odd number of factors?
all perfect square numbers
What are perfact numbers?
If the sum of all a number's factors (factors that are smaller than the number itself) is equal to the number itself, the number is said to be "perfect". For example, the factors of 6 (excluding 6 itself) are 1, 2, and 3; and the sum of these numbers is exactly 6. The smallest perfect numbers are 6, 28, 496, 8128. It isn't known whether the set of perfect numbers is finite or infinite. Also, it isn't known whether there are any odd perfect number; all known perfect numbers are even.
Is 42 a perfect number?
Use the definition of a perfect number! Add the factors; if the sum of all the factors (excluding the number itself) is equal to the number, it is a perfect number, otherwise it isn't. (Actually, the only perfect numbers less than 100 are 6, and 28.)Use the definition of a perfect number! Add the factors; if the sum of all the factors (excluding the number itself) is equal to the number, it is a perfect number, otherwise it isn't. (Actually, the only perfect numbers less than 100 are 6, and 28.)Use the definition of a perfect number! Add the factors; if the sum of all the factors (excluding the number itself) is equal to the number, it is a perfect number, otherwise it isn't. (Actually, the only perfect numbers less than 100 are 6, and 28.)Use the definition of a perfect number! Add the factors; if the sum of all the factors (excluding the number itself) is equal to the number, it is a perfect number, otherwise it isn't. (Actually, the only perfect numbers less than 100 are 6, and 28.)
Is 1044 a square number?
Yes, in so far as all numbers are squares (of some number). But it is not a perfect square.
What are near perfect numbers?
They are numbers that are NEAR PERFECT. a near perfect number is when its factors (exept the actual number) are added up and ALMOST equal the number ex. 16x1/2x8/4x4/ so its factors are 1,2,4,8 and 16 so add them ( exept the actual number) 1+2+4+8=15 so its NEAR PERFECT and a perfect number is a number that all its factors equal to its number ex. 6-1,2,3,6 are its factors all together-1+2+3=6 those are NEAR PERFECT and PERFECT numbers
Why are perfect numbers perfect?
A perfect number is only classified as a perfect number because all of its proper divisors add up to itself. For example, the proper divisors of six are one, two and three. Those numbers added together equal six. Therefore, six is a perfect number.
Is 40 a perfect number?
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
What numbers are there in a square number?
In the appropriate domain, all numbers are square numbers. Perfect square numbers are numbers that are obtained by multiplying an integer by itself.
