28 has only six factors: 1 2 4 7 14 28.
108 has twelve factors, 112 has ten factors.
The First Ten Years was created on 1990-04-28.
28 only has six factors: 1, 2, 4, 7, 14, 28.
8 only has four factors.
81 only has five factors.
86 has four factors: 1, 2, 43, 86
The first ten prime numbers are 2,3,5,7,11,13,17,19,23 and 29.
The first ten happy numbers are: 1, 7, 10, 13, 19, 23, 28, 31, 32, 44
28, 56, 84, 112, 140, 168, 196, 224, 252, 280.
17 is a prime number and only has two factors, one and itself.
To find the prime factors of 28 start with any factor pair of 28 and keep factoring the composite factors until all the factors are prime. 28 2 x 14 2 x 2 x 7 The three prime factors of 28 are 2, 2, 7.
But 2 has only two factors which are itself and one because it is a prime number.