21553191

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 35747712

約数和(自身を除く): 14194521

約数列:

[1, 3, 9, 11, 33, 43, 61, 83, 99, 129, 183, 249, 387, 473, 549, 671, 747, 913, 1419, 2013, 2623, 2739, 3569, 4257, 5063, 6039, 7869, 8217, 10707, 15189, 23607, 28853, 32121, 39259, 45567, 55693, 86559, 117777, 167079, 217709, 259677, 353331, 501237, 653127, 1959381, 2394799, 7184397, 21553191]

約数ペア:

[(1, 21553191), (3, 7184397), (9, 2394799), (11, 1959381), (33, 653127), (43, 501237), (61, 353331), (83, 259677), (99, 217709), (129, 167079), (183, 117777), (249, 86559), (387, 55693), (473, 45567), (549, 39259), (671, 32121), (747, 28853), (913, 23607), (1419, 15189), (2013, 10707), (2623, 8217), (2739, 7869), (3569, 6039), (4257, 5063)]