Friendly parts? All I can say is that 57 = 3x19. 3 and 19 are prime numbers, and this is the only way to get 57 by multiplying.
Dividing 57 into three equal parts is the same as saying 57 / 3, which is equal to 19.
19
3 and 10 are the friendly parts of 30
the friendly parts for 64 is the multiples of 2,and 4
20,6
it is 44
doing
30 and 21
five
Vanilla 99; cone 22; mint 57; chip 33
8 and 6