21220155

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{163}}^1\times {\mathrm{263}}^1$

素因数の和:448

約数の個数: 48

約数和(自身を含む): 40525056

約数和(自身を除く): 19304901

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 163, 165, 263, 489, 495, 789, 815, 1315, 1467, 1793, 2367, 2445, 2893, 3945, 5379, 7335, 8679, 8965, 11835, 14465, 16137, 26037, 26895, 42869, 43395, 80685, 128607, 130185, 214345, 385821, 471559, 643035, 1414677, 1929105, 2357795, 4244031, 7073385, 21220155]

約数ペア:

[(1, 21220155), (3, 7073385), (5, 4244031), (9, 2357795), (11, 1929105), (15, 1414677), (33, 643035), (45, 471559), (55, 385821), (99, 214345), (163, 130185), (165, 128607), (263, 80685), (489, 43395), (495, 42869), (789, 26895), (815, 26037), (1315, 16137), (1467, 14465), (1793, 11835), (2367, 8965), (2445, 8679), (2893, 7335), (3945, 5379)]