21216459

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{641}}^1$

素因数の和:731

約数の個数: 32

約数和(自身を含む): 33281280

約数和(自身を除く): 12064821

約数列:

[1, 3, 11, 17, 33, 51, 59, 177, 187, 561, 641, 649, 1003, 1923, 1947, 3009, 7051, 10897, 11033, 21153, 32691, 33099, 37819, 113457, 119867, 359601, 416009, 642923, 1248027, 1928769, 7072153, 21216459]

約数ペア:

[(1, 21216459), (3, 7072153), (11, 1928769), (17, 1248027), (33, 642923), (51, 416009), (59, 359601), (177, 119867), (187, 113457), (561, 37819), (641, 33099), (649, 32691), (1003, 21153), (1923, 11033), (1947, 10897), (3009, 7051)]