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No, 49 is not divisible by 14.
The factors of 49 are 1, 7, and 49. When you add them together you get 57, which is the sum.
1, 31, 263, 8153.
No, it isn't. You can always check - by adding the digits together. If the resulting number is divisible by 3, then the original number is too. In this example - 9+8=17... 17 will NOT divide by three exactly therefore 98 won't either.
7, 31, 49, 217.