12357261

素因数分解:

$3^2\times 7^3\times {\mathrm{4003}}^1$

素因数の和:4030

約数の個数: 24

約数和(自身を含む): 20820800

約数和(自身を除く): 8463539

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 1029, 3087, 4003, 12009, 28021, 36027, 84063, 196147, 252189, 588441, 1373029, 1765323, 4119087, 12357261]

約数ペア:

[(1, 12357261), (3, 4119087), (7, 1765323), (9, 1373029), (21, 588441), (49, 252189), (63, 196147), (147, 84063), (343, 36027), (441, 28021), (1029, 12009), (3087, 4003)]