21090531

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13043}}^1$

素因数の和:13071

約数の個数: 24

約数和(自身を含む): 35688384

約数和(自身を除く): 14597853

約数列:

[1, 3, 7, 11, 21, 33, 49, 77, 147, 231, 539, 1617, 13043, 39129, 91301, 143473, 273903, 430419, 639107, 1004311, 1917321, 3012933, 7030177, 21090531]

約数ペア:

[(1, 21090531), (3, 7030177), (7, 3012933), (11, 1917321), (21, 1004311), (33, 639107), (49, 430419), (77, 273903), (147, 143473), (231, 91301), (539, 39129), (1617, 13043)]