16720145

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{3623}}^1$

素因数の和:3712

約数の個数: 16

約数和(自身を含む): 21917952

約数和(自身を除く): 5197807

約数列:

[1, 5, 13, 65, 71, 355, 923, 3623, 4615, 18115, 47099, 235495, 257233, 1286165, 3344029, 16720145]

約数ペア:

[(1, 16720145), (5, 3344029), (13, 1286165), (65, 257233), (71, 235495), (355, 47099), (923, 18115), (3623, 4615)]