Question

Find the no. Of divisor of 280 and there sum

Answer 1

Answer:

720

Step-by-step explanation:

Given  

Find the no. Of divisor of 280 and there sum  

We need to find factors or divisors for 280.

So starting from 1 we get

1,2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280 .

So there are 16 factors.

Sum of these numbers will be 720 by adding.

We can also find the number of divisors by prime factorization. So factors of 280 will be

2 x 2 x 2 x 5 x 7

So it will be 2^3 x 5 x 7

Adding 1 to powers of these factors we get

3 + 1 = 4, 1 + 1 = 2, 1 + 1 = 2

Now multiplying 4 x 2 x 2 = 16

So there are 16 divisors.