Hello, skyskiers!

If they had asked for "theof factors which are multiples of 8number

but not a multiple of 25", there are some theorems we could use.

. . . There are 12.

But they asked for thesumof these factors.

I see no choice but tofindall these factors and add them.

It is not a very intellectual problem, is it?

There are 60 factors.Find the sum of the factors of 18,000 which are multiple of 8 but are not multiple of 25.

I found them by simple division.

. . . . . . . .

As promised, there are 12 such factors.

Their sum is: .