19995129

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:139

約数の個数: 72

約数和(自身を含む): 37733696

約数和(自身を除く): 17738567

約数列:

[1, 3, 7, 9, 11, 21, 33, 43, 61, 63, 77, 99, 121, 129, 183, 231, 301, 363, 387, 427, 473, 549, 671, 693, 847, 903, 1089, 1281, 1419, 2013, 2541, 2623, 2709, 3311, 3843, 4257, 4697, 5203, 6039, 7381, 7623, 7869, 9933, 14091, 15609, 18361, 22143, 23607, 28853, 29799, 36421, 42273, 46827, 51667, 55083, 66429, 86559, 109263, 155001, 165249, 201971, 259677, 317383, 327789, 465003, 605913, 952149, 1817739, 2221681, 2856447, 6665043, 19995129]

約数ペア:

[(1, 19995129), (3, 6665043), (7, 2856447), (9, 2221681), (11, 1817739), (21, 952149), (33, 605913), (43, 465003), (61, 327789), (63, 317383), (77, 259677), (99, 201971), (121, 165249), (129, 155001), (183, 109263), (231, 86559), (301, 66429), (363, 55083), (387, 51667), (427, 46827), (473, 42273), (549, 36421), (671, 29799), (693, 28853), (847, 23607), (903, 22143), (1089, 18361), (1281, 15609), (1419, 14091), (2013, 9933), (2541, 7869), (2623, 7623), (2709, 7381), (3311, 6039), (3843, 5203), (4257, 4697)]