20691385

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{673}}^1$

素因数の和:745

約数の個数: 32

約数和(自身を含む): 29893248

約数和(自身を除く): 9201863

約数列:

[1, 5, 11, 13, 43, 55, 65, 143, 215, 473, 559, 673, 715, 2365, 2795, 3365, 6149, 7403, 8749, 28939, 30745, 37015, 43745, 96239, 144695, 318329, 376207, 481195, 1591645, 1881035, 4138277, 20691385]

約数ペア:

[(1, 20691385), (5, 4138277), (11, 1881035), (13, 1591645), (43, 481195), (55, 376207), (65, 318329), (143, 144695), (215, 96239), (473, 43745), (559, 37015), (673, 30745), (715, 28939), (2365, 8749), (2795, 7403), (3365, 6149)]