The phrase "affect a number of" is correct and usable in written English.
It can be used when discussing the impact or influence of something on multiple entities or aspects.
Example: "The new policy will affect a number of employees across different departments."
Alternatives: "impact several" or "influence a variety of".
It's very likely to affect a number of the countries that are here today.
"This ruling could adversely affect a number of cooperatives throughout the metropolitan area," Mr. Brett said.
Associated British Ports (ABP) said the cuts would affect a number of its departments, including Humber Estuary Services, operations, safety and training, administration, engineering, finance and IT.
Such concerns are said to affect a number of prisoners remaining in Guantánamo, although December also saw two Saudi prisoners returned to their own country.
"If you want to be political, you have to do something in the mainstream, something that is going to affect a number of people.
"This action would only affect a number of Edinburgh-based staff and our services will run as normal, so passengers shouldn't be concerned".
The recent Supreme Court rulings on same-sex marriage will affect a number of aspects of American life, and travel is one of them.
That is terrible news for farmers and ranchers and will affect a number of other economic sectors too, like tourism and electric power production.
Housing was typically regarded as a state or territory responsibility, but reducing overcrowding could affect a number of the Coag targets, including literacy and numeracy levels, family and community violence, and disability, it said.
But the EU also needs clarity on the direction of the journey as Brexit will affect a number of EU policy areas, not least those areas related to the EU budget.
Loon specialists like Dr. Nina Schoch of the Adirondack Cooperative Loon Program acknowledge that the acid rain and the mercury emissions affect a number of other birds in the northeastern lakes.
