20797205

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1$

素因数の和:134

約数の個数: 64

約数和(自身を含む): 32659200

約数和(自身を除く): 11861995

約数列:

[1, 5, 11, 13, 17, 29, 55, 59, 65, 85, 143, 145, 187, 221, 295, 319, 377, 493, 649, 715, 767, 935, 1003, 1105, 1595, 1711, 1885, 2431, 2465, 3245, 3835, 4147, 5015, 5423, 6409, 8437, 8555, 11033, 12155, 13039, 18821, 20735, 22243, 27115, 29087, 32045, 42185, 55165, 65195, 70499, 94105, 111215, 143429, 145435, 244673, 319957, 352495, 378131, 717145, 1223365, 1599785, 1890655, 4159441, 20797205]

約数ペア:

[(1, 20797205), (5, 4159441), (11, 1890655), (13, 1599785), (17, 1223365), (29, 717145), (55, 378131), (59, 352495), (65, 319957), (85, 244673), (143, 145435), (145, 143429), (187, 111215), (221, 94105), (295, 70499), (319, 65195), (377, 55165), (493, 42185), (649, 32045), (715, 29087), (767, 27115), (935, 22243), (1003, 20735), (1105, 18821), (1595, 13039), (1711, 12155), (1885, 11033), (2431, 8555), (2465, 8437), (3245, 6409), (3835, 5423), (4147, 5015)]