20906739

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{8969}}^1$

素因数の和:9019

約数の個数: 24

約数和(自身を含む): 35449440

約数和(自身を除く): 14542701

約数列:

[1, 3, 7, 9, 21, 37, 63, 111, 259, 333, 777, 2331, 8969, 26907, 62783, 80721, 188349, 331853, 565047, 995559, 2322971, 2986677, 6968913, 20906739]

約数ペア:

[(1, 20906739), (3, 6968913), (7, 2986677), (9, 2322971), (21, 995559), (37, 565047), (63, 331853), (111, 188349), (259, 80721), (333, 62783), (777, 26907), (2331, 8969)]