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How many numbers less than 100 have 5 factors?
10,20,30,40,50,60,70,80,90
How many natural numbers less than 1000 will have exactly 3 factors?
11
How many whole numbers less than 10 have an odd numbers of unique factors?
A whole number has an odd number of unique factors if and only if it is a perfect square. The perfect squares less than 10 are 0, 1, 4, and 9. Therefore, there are four whole numbers less than 10 that have an odd number of unique factors.
What numbers would have less than two factors?
Prime numbers
How many numbers less than 100 have exactly nine distinct factors?
Just 36.
How many whole numbers less than 2010 have exactly three factors?
14 (I think).
How many numbers less than 10 have exactly 2 factors?
there are 3 no.2,3 & 5
How many numbers which are less than 1000 have an odd number of factors?
Perfect squares have an odd number of factors. There are 31 perfect squares less than 1000.
What is special about numbers less than fifty that have less than three factors?
They all are prime numbers except 1
How many numbers are there less than thirty have exactly 6 factors?
Numbers with exactly 6 factors are perfect squares of prime numbers. The prime factorization of a number with exactly 6 factors is in the form ( p^2 ), where ( p ) is a prime number. There are 10 prime numbers less than 30: 2, 3, 5, 7, 11, 13, 17, 19, 23, and 29. So, there are 10 numbers less than 30 that have exactly 6 factors.
How many integers less than 60 have an even number of factors?
All but the square numbers - 53 of them.
What number less than 19 has more than 4 factors?
There are a few numbers that are less than 19 and have more than 4 factors. The number 10 is less than 19 and has more than four factors.
