56
24
56
28.
20 and 28 both have six factors.
28
7*4 A number which can go into a number is called a factor. factors of 28 = 1, 2, 4, 7, 14, 28 to find the factors of a certain number, divide this number by numbers from 1 to whatever the number is, and if the answer is an integer (whole number), it is a factor, e.g. 28: 28 divided by 4=7 therefore, both 4 and 7 are factors of 28 28 divided by 14=2 therefore 14 and 2 are factors of 28 28 divided by 28=1 therefore 28 and 1 are factors of 28 therefore, factors of 28 are 1, 28, 2, 14, 4, 7
28 is a composite number because it has more than two factors but 29 is a prime number because it has only two factors.
The factors of 28 are: 1, 2, 4, 7, 14, 28.
28. The sum of its factors (smaller than 28) is 1 + 2 + 4 + 7 + 14 = 28.
840 has 32 different factors - including 1 and itself. The next highest has 28 factors.
20 and 28 both have six factors.
28 is a composite number because it has factors of 2 and 7.