21205531881

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{331}}^1\times {\mathrm{309493}}^1$

素因数の和:309853

約数の個数: 24

約数和(自身を含む): 32058626496

約数和(自身を除く): 10853094615

約数列:

[1, 3, 9, 23, 69, 207, 331, 993, 2979, 7613, 22839, 68517, 309493, 928479, 2785437, 7118339, 21355017, 64065051, 102442183, 307326549, 921979647, 2356170209, 7068510627, 21205531881]

約数ペア:

[(1, 21205531881), (3, 7068510627), (9, 2356170209), (23, 921979647), (69, 307326549), (207, 102442183), (331, 64065051), (993, 21355017), (2979, 7118339), (7613, 2785437), (22839, 928479), (68517, 309493)]