20391459

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{31}}^2\times {\mathrm{643}}^1$

素因数の和:719

約数の個数: 24

約数和(自身を含む): 30695616

約数和(自身を除く): 10304157

約数列:

[1, 3, 11, 31, 33, 93, 341, 643, 961, 1023, 1929, 2883, 7073, 10571, 19933, 21219, 31713, 59799, 219263, 617923, 657789, 1853769, 6797153, 20391459]

約数ペア:

[(1, 20391459), (3, 6797153), (11, 1853769), (31, 657789), (33, 617923), (93, 219263), (341, 59799), (643, 31713), (961, 21219), (1023, 19933), (1929, 10571), (2883, 7073)]