<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def integer_byte_size(n):
    '''Returns the number of bytes necessary to store the integer n.'''
    quanta, mod = divmod(integer_bit_size(n), 8)
    if mod or n == 0:
        quanta += 1
    return quanta