20997545

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{769}}^1$

素因数の和:944

約数の個数: 16

約数和(自身を含む): 26019840

約数和(自身を除く): 5022295

約数列:

[1, 5, 43, 127, 215, 635, 769, 3845, 5461, 27305, 33067, 97663, 165335, 488315, 4199509, 20997545]

約数ペア:

[(1, 20997545), (5, 4199509), (43, 488315), (127, 165335), (215, 97663), (635, 33067), (769, 27305), (3845, 5461)]