我可以得到给定数量的因数和因数:
def all_factors(x):
factors = []
for i in range(1, x + 1):
if x % i == 0:
factors.append(i)
return factors
print(all_factors(320))
print(len(all_factors(320)))
它提供以下输出:
[1、2、4、5、8、10、16、20、32、40、64、80、160、320]
14
但是,我该怎么做呢?例如:如果我的因子数= 4,则可能的列表必须为[6、10、14、21,...],在这里我们可以限制列表中的最大整数。
您可以使用:
def all_factors(x, number_factors):
factors = []
for i in range(1, x + 1):
if len(factors) == number_factors:
break
if x % i == 0:
factors.append(i)
return factors
Code使用您的all_factors代码
def reverse_factors(n, max_):
# Loops through numbers from 1 to max_ to check
# and keeps the ones with desired number of factors
# as determined by len(all_factors(x))
return [x for x in range(1, max_+1) if len(all_factors(x)) == n]
Test
# Numbers with 4 factors up to 30
print(reverse_factors(4, 30))
输出
[6, 8, 10, 14, 15, 21, 22, 26, 27]
尝试:
n =int(input("Enter the limit: "))
factno = int(input("No of factors: ")) # here 4
listing = []
for i in range(1,n+1):
#Your code here to find factors and to add then to a list named "factors'
factors = []
for j in range(1, i + 1):
if i % j == 0:
factors.append(j)
if len(factors) == factno:
listing.append(i)
print(listing)