21106431

素因数分解:

$3^2\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{1217}}^1$

素因数の和:1311

約数の個数: 24

約数和(自身を含む): 31921344

約数和(自身を除く): 10814913

約数列:

[1, 3, 9, 41, 47, 123, 141, 369, 423, 1217, 1927, 3651, 5781, 10953, 17343, 49897, 57199, 149691, 171597, 449073, 514791, 2345159, 7035477, 21106431]

約数ペア:

[(1, 21106431), (3, 7035477), (9, 2345159), (41, 514791), (47, 449073), (123, 171597), (141, 149691), (369, 57199), (423, 49897), (1217, 17343), (1927, 10953), (3651, 5781)]