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how many integers can be factors of 78? (do it without tediously listing the factors)

Sorry, but I'm a little confused. I came across a similar problem and had trouble with your method. The question is how many positive intergers are factors of 441?

how many integers can be factors of 78? (do it without tediously listing the factors)

Sorry, but I'm a little confused. I came across a similar problem and had trouble with your method. The question is how many positive intergers are factors of 441?