209979

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1$

素因数の和:128

約数の個数: 32

約数和(自身を含む): 391680

約数和(自身を除く): 181701

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 63, 77, 99, 101, 189, 231, 297, 303, 693, 707, 909, 1111, 2079, 2121, 2727, 3333, 6363, 7777, 9999, 19089, 23331, 29997, 69993, 209979]

約数ペア:

[(1, 209979), (3, 69993), (7, 29997), (9, 23331), (11, 19089), (21, 9999), (27, 7777), (33, 6363), (63, 3333), (77, 2727), (99, 2121), (101, 2079), (189, 1111), (231, 909), (297, 707), (303, 693)]