18720801

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{21011}}^1$

素因数の和:21034

約数の個数: 20

約数和(自身を含む): 30509424

約数和(自身を除く): 11788623

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 297, 891, 21011, 63033, 189099, 231121, 567297, 693363, 1701891, 2080089, 6240267, 18720801]

約数ペア:

[(1, 18720801), (3, 6240267), (9, 2080089), (11, 1701891), (27, 693363), (33, 567297), (81, 231121), (99, 189099), (297, 63033), (891, 21011)]