21382857

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{109}}^1\times {\mathrm{307}}^1$

素因数の和:493

約数の個数: 24

約数和(自身を含む): 31711680

約数和(自身を除く): 10328823

約数列:

[1, 3, 9, 71, 109, 213, 307, 327, 639, 921, 981, 2763, 7739, 21797, 23217, 33463, 65391, 69651, 100389, 196173, 301167, 2375873, 7127619, 21382857]

約数ペア:

[(1, 21382857), (3, 7127619), (9, 2375873), (71, 301167), (109, 196173), (213, 100389), (307, 69651), (327, 65391), (639, 33463), (921, 23217), (981, 21797), (2763, 7739)]