20804409

素因数分解:

$3^2\times {\mathrm{47}}^1\times {\mathrm{137}}^1\times {\mathrm{359}}^1$

素因数の和:549

約数の個数: 24

約数和(自身を含む): 31000320

約数和(自身を除く): 10195911

約数列:

[1, 3, 9, 47, 137, 141, 359, 411, 423, 1077, 1233, 3231, 6439, 16873, 19317, 49183, 50619, 57951, 147549, 151857, 442647, 2311601, 6934803, 20804409]

約数ペア:

[(1, 20804409), (3, 6934803), (9, 2311601), (47, 442647), (137, 151857), (141, 147549), (359, 57951), (411, 50619), (423, 49183), (1077, 19317), (1233, 16873), (3231, 6439)]