21680043

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{739}}^1$

素因数の和:887

約数の個数: 32

約数和(自身を含む): 36372480

約数和(自身を除く): 14692437

約数列:

[1, 3, 7, 11, 21, 33, 77, 127, 231, 381, 739, 889, 1397, 2217, 2667, 4191, 5173, 8129, 9779, 15519, 24387, 29337, 56903, 93853, 170709, 281559, 656971, 1032383, 1970913, 3097149, 7226681, 21680043]

約数ペア:

[(1, 21680043), (3, 7226681), (7, 3097149), (11, 1970913), (21, 1032383), (33, 656971), (77, 281559), (127, 170709), (231, 93853), (381, 56903), (739, 29337), (889, 24387), (1397, 15519), (2217, 9779), (2667, 8129), (4191, 5173)]