With the numbers: 0,1,2,3,4,5,6,7,8,9 there are 10000 four letter combination's - ten options for the first number times ten options for the second number times ten options for the third number and so on. :)
Numbers without factors are PRIME Numbers. Taking the first ten numbers. 1,2,3,4,5,6,7,8,9,10. The prime numbers are 2,3,5,7, they have no factors. 4,6,8,9,10. Are not prime numbers as they have factors. 4 has a factor of '2' 6 has factors of '2 & 3'. 8 has factors of' 2 & 4'. or' 2,2,2.' 9 has factors of '3,3', 10 has factors of '2 5.' '1' is unique
8 only has four factors.
48 is divisible by ten factors. There is an infinite amount of numbers divisible by 48.
17 is a prime number and only has two factors, one and itself.
Those would be the squares of prime numbers: 22, 32, 52, etc.
38.5
Square numbers 1, 4, 9, 16, 25, 36, 49, 64, 81, 100
16,17,18,19,20,21,22,23,24,25.
The first ten prime numbers are 2,3,5,7,11,13,17,19,23 and 29.
The next square number after ten (which is not a square number) is 16. Sixteen has five factors.
There are infinitely many squares.The first ten are:149162536496481100
With the numbers: 0,1,2,3,4,5,6,7,8,9 there are 10000 four letter combination's - ten options for the first number times ten options for the second number times ten options for the third number and so on. :)
1, 2, 3, 4, 5, 6, 7, 8, 9, and 10.
Numbers without factors are PRIME Numbers. Taking the first ten numbers. 1,2,3,4,5,6,7,8,9,10. The prime numbers are 2,3,5,7, they have no factors. 4,6,8,9,10. Are not prime numbers as they have factors. 4 has a factor of '2' 6 has factors of '2 & 3'. 8 has factors of' 2 & 4'. or' 2,2,2.' 9 has factors of '3,3', 10 has factors of '2 5.' '1' is unique
108 has twelve factors, 112 has ten factors.
60, 72, 84, 90 and 96 are the numbers up to and including 100 that have ten proper factors