20105525

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{647}}^1$

素因数の和:781

約数の個数: 24

約数和(自身を含む): 27480384

約数和(自身を除く): 7374859

約数列:

[1, 5, 11, 25, 55, 113, 275, 565, 647, 1243, 2825, 3235, 6215, 7117, 16175, 31075, 35585, 73111, 177925, 365555, 804221, 1827775, 4021105, 20105525]

約数ペア:

[(1, 20105525), (5, 4021105), (11, 1827775), (25, 804221), (55, 365555), (113, 177925), (275, 73111), (565, 35585), (647, 31075), (1243, 16175), (2825, 7117), (3235, 6215)]