21381459

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{15803}}^1$

素因数の和:15858

約数の個数: 16

約数和(自身を含む): 31860864

約数和(自身を除く): 10479405

約数列:

[1, 3, 11, 33, 41, 123, 451, 1353, 15803, 47409, 173833, 521499, 647923, 1943769, 7127153, 21381459]

約数ペア:

[(1, 21381459), (3, 7127153), (11, 1943769), (33, 647923), (41, 521499), (123, 173833), (451, 47409), (1353, 15803)]