20255571

素因数分解:

$3^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{1997}}^1$

素因数の和:2040

約数の個数: 36

約数和(自身を含む): 35532432

約数和(自身を除く): 15276861

約数列:

[1, 3, 7, 9, 21, 23, 49, 63, 69, 147, 161, 207, 441, 483, 1127, 1449, 1997, 3381, 5991, 10143, 13979, 17973, 41937, 45931, 97853, 125811, 137793, 293559, 321517, 413379, 880677, 964551, 2250619, 2893653, 6751857, 20255571]

約数ペア:

[(1, 20255571), (3, 6751857), (7, 2893653), (9, 2250619), (21, 964551), (23, 880677), (49, 413379), (63, 321517), (69, 293559), (147, 137793), (161, 125811), (207, 97853), (441, 45931), (483, 41937), (1127, 17973), (1449, 13979), (1997, 10143), (3381, 5991)]