209901321

素因数分解:

$3^3\times 7^1\times {\mathrm{1110589}}^1$

素因数の和:1110605

約数の個数: 16

約数和(自身を含む): 355388800

約数和(自身を除く): 145487479

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 1110589, 3331767, 7774123, 9995301, 23322369, 29985903, 69967107, 209901321]

約数ペア:

[(1, 209901321), (3, 69967107), (7, 29985903), (9, 23322369), (21, 9995301), (27, 7774123), (63, 3331767), (189, 1110589)]