64, 729, 15625 and so on.
Prime numbers to the 6th power.
Five and seven.
Two and seven.
3 and 29
42
One.
64, 729, 15625 and so on. Prime numbers to the 6th power.
420 and 840
97 is prime. Prime numbers don't have proper factors.
Start with the factors. Multiply combinations of three prime factors, then combinations of five, then seven, etc. All generated numbers will be guaranteed to have an odd number of prime factors.
105, 210, 315
It's not entirely clear from the wording of your question what it is you want to know. Seven is a one-digit number. The sum of its digits is 7. Seven has two factors: 1 and 7. That sum is 8.
Well, being that 7 is a prime number (only one and itself will go into it evenly), there are no other numbers that share all of the common factors of the number seven, and only those factors, but if you are asking what numbers share either or any of the common factors of seven, your answer would be, infinity. Because 1 will go into every other number except 0. I hope I'm understanding your question correctly.