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To tackle this question, you first need to break the number down into its prime factors. In this case we have

64 = 2x2x2x2x2x2

To find the greater factors, you need to multiply any combination of these. That gives us the factors as 2, 4, 8, 16, 32 and 64

Adding these up for the sum gives us 126

Thus the sum of all even factors of 64 is 126.

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13y ago

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