21506149

素因数分解:

$7^2\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{173}}^1$

素因数の和:289

約数の個数: 24

約数和(自身を含む): 26183520

約数和(自身を除く): 4677371

約数列:

[1, 7, 43, 49, 59, 173, 301, 413, 1211, 2107, 2537, 2891, 7439, 8477, 10207, 17759, 52073, 71449, 124313, 364511, 438901, 500143, 3072307, 21506149]

約数ペア:

[(1, 21506149), (7, 3072307), (43, 500143), (49, 438901), (59, 364511), (173, 124313), (301, 71449), (413, 52073), (1211, 17759), (2107, 10207), (2537, 8477), (2891, 7439)]