81531220

素因数分解:

$2^2\times 5^1\times {\mathrm{1811}}^1\times {\mathrm{2251}}^1$

素因数の和:4071

約数の個数: 24

約数和(自身を含む): 171386208

約数和(自身を除く): 89854988

約数列:

[1, 2, 4, 5, 10, 20, 1811, 2251, 3622, 4502, 7244, 9004, 9055, 11255, 18110, 22510, 36220, 45020, 4076561, 8153122, 16306244, 20382805, 40765610, 81531220]

約数ペア:

[(1, 81531220), (2, 40765610), (4, 20382805), (5, 16306244), (10, 8153122), (20, 4076561), (1811, 45020), (2251, 36220), (3622, 22510), (4502, 18110), (7244, 11255), (9004, 9055)]