1,2,4,7,14,28
The divisors of 28 are: 1, 2, 4, 7, 14, 28.
An example - the divisors of 28 are 1 -2 - 4 - 7 - 14 and 28. In other words 1+2+4+7+14 = 28
Yes
28 has six divisors: 1, 2, 4, 7, 14, 28.
The numbers that go into both 28 and 70 are known as their common divisors. The common divisors of 28 are 1, 2, 4, 7, 14, and 28, while the common divisors of 70 are 1, 2, 5, 7, 10, 14, 35, and 70. The common divisors of both numbers are 1, 2, 7, and 14. Hence, the numbers that go into both 28 and 70 are 1, 2, 7, and 14.
Actually, 56 has eight divisors: 1, 2, 4, 7, 8, 14, 28, 56.
15
1, 2, 7, and 14 are common divisors (and common factors) of 28 and 42.
14 is deficient. It is less than the sum of it's divisors. In mathematics, a deficient number or defective number is a number n for which σ(n) < 2n. Here σ(n) is the sum-of-divisors function: the sum of all positive divisors of n, including n itself Proof.. divisors of 14 are 1,2, and 7 and 14. Now, 2n=28 and and the sum the all the divisors including 14 is 24<28
It isn't a perfect number.A perfect number is a number which is the sum of its proper divisors (including 1, but excluding itself).The divisors of 20 are 1, 2, 4, 5, 10.1 + 2 + 4 + 5 + 10 = 22 => 20 is not a perfect number.An example of a perfect number is 28:The divisors of 28 are 1, 2, 4, 7, 141 + 2 + 4 + 7 + 14 = 28 => 28 is a perfect number.
The divisors of 280 are: 1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280.
They are: 1, 2, 4, 7, 8, 14, 28, 56.