Find all factors of the numbers below. i) 256 ii) 625 iii) 243 iv) 121

Explanation

i) `256=2xx 2xx 2xx .2xx 2xx 2xx 2xx 2`
So we can write 256 as `2xx 128`
`4xx 64`
`8xx 32`
`16xx 16`
`1xx 256`
Thus wo have nine factors `{ }_{1} \mathrm{~s} \mathrm{c}` `1,-2,4,8,16,32,64,128,256`

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