Buggy python submission (verdict: Runtime Error):
def sample_code(N):

 #   print('Prime factor')
    fct = factorize(N)
 #   print(fct,num(fct))

 #   print('divisor')
    for div in divisorize(fct):
        b = num(div)


def divisorize(fct):
    b,e = fct.pop()
    pre_div = divisorize(fct) if fct else [[]]
    suf_div = [[(b,k)] for k in range(e + 1)]
    return [pre + suf for pre in pre_div for suf in suf_div]

def factorize(N):
    fct = []
    b,e = 2, 0
    while b * b <= N:
        while N % b == 0:
            N = N // b
            e = e + 1
        if e > 0:
            fct.append((b,e))
        b,e = b + 1,0
    if N > 1:
        fct.append((N,1))
    return fct

def num(fct):
    a = 1
    for base, exponent in fct:
        a = a * base ** exponent
        divisor_list.append(a)
    return a

N = int(input())
sum_m = 0
divisor_list = []
sample_code(N)
divisor_list = list(set(divisor_list))

for c in divisor_list:
    if c != 1 and c!= 2:
        if N // (c-1) >= (c-1):
            continue
        else:
            sum_m += c - 1

print(sum_m)

Fixed submission:
def sample_code(N):

 #   print('Prime factor')
    fct = factorize(N)
 #   print(fct,num(fct))

 #   print('divisor')
    for div in divisorize(fct):
        b = num(div)


def divisorize(fct):
    b,e = fct.pop()
    pre_div = divisorize(fct) if fct else [[]]
    suf_div = [[(b,k)] for k in range(e + 1)]
    return [pre + suf for pre in pre_div for suf in suf_div]

def factorize(N):
    fct = []
    b,e = 2, 0
    while b * b <= N:
        while N % b == 0:
            N = N // b
            e = e + 1
        if e > 0:
            fct.append((b,e))
        b,e = b + 1,0
    if N > 1:
        fct.append((N,1))
    return fct

def num(fct):
    a = 1
    for base, exponent in fct:
        a = a * base ** exponent
        divisor_list.append(a)
    return a

N = int(input())
sum_m = 0
divisor_list = []
if N == 1:
    print(0)
else:
    sample_code(N)
    divisor_list = list(set(divisor_list))

    for c in divisor_list:
        if c != 1 and c!= 2:
            if N // (c-1) >= (c-1):
                continue
            else:
                sum_m += c - 1

    print(sum_m)

Buggy python submission (verdict: Runtime Error):
def sample_code(N):

 #   print('Prime factor')
    fct = factorize(N)
 #   print(fct,num(fct))

 #   print('divisor')
    for div in divisorize(fct):
        continue
 #       print(div,num(div))


def divisorize(fct):
    b,e = fct.pop()
    pre_div = divisorize(fct) if fct else [[]]
    suf_div = [[(b,k)] for k in range(e + 1)]
    return [pre + suf for pre in pre_div for suf in suf_div]

def factorize(N):
    fct = []
    b,e = 2, 0
    while b * b <= N:
        while N % b == 0:
            N = N // b
            e = e + 1
        if e > 0:
            fct.append((b,e))
        b,e = b + 1,0
    if N > 1:
        fct.append((N,1))
    return fct

def num(fct):
    a = 1
    for base, exponent in fct:
        a = a * base ** exponent
        divisor_list.append(a)
    return a

N = int(input())
sum_m = 0
divisor_list = []
sample_code(N)
divisor_list = list(set(divisor_list))

for c in divisor_list:
    if c != 1 and c!= 2:
        if N // (c-1) >= (c-1):
            continue
        else:
            sum_m += c - 1

print(sum_m)

Fixed submission:
def sample_code(N):

 #   print('Prime factor')
    fct = factorize(N)
 #   print(fct,num(fct))

 #   print('divisor')
    for div in divisorize(fct):
        b = num(div)


def divisorize(fct):
    b,e = fct.pop()
    pre_div = divisorize(fct) if fct else [[]]
    suf_div = [[(b,k)] for k in range(e + 1)]
    return [pre + suf for pre in pre_div for suf in suf_div]

def factorize(N):
    fct = []
    b,e = 2, 0
    while b * b <= N:
        while N % b == 0:
            N = N // b
            e = e + 1
        if e > 0:
            fct.append((b,e))
        b,e = b + 1,0
    if N > 1:
        fct.append((N,1))
    return fct

def num(fct):
    a = 1
    for base, exponent in fct:
        a = a * base ** exponent
        divisor_list.append(a)
    return a

N = int(input())
sum_m = 0
divisor_list = []
if N == 1:
    print(0)
else:
    sample_code(N)
    divisor_list = list(set(divisor_list))

    for c in divisor_list:
        if c != 1 and c!= 2:
            if N // (c-1) >= (c-1):
                continue
            else:
                sum_m += c - 1

    print(sum_m)