21054187

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{2153}}^1$

素因数の和:2298

約数の個数: 16

約数和(自身を含む): 26468352

約数和(自身を除く): 5414165

約数列:

[1, 7, 11, 77, 127, 889, 1397, 2153, 9779, 15071, 23683, 165781, 273431, 1914017, 3007741, 21054187]

約数ペア:

[(1, 21054187), (7, 3007741), (11, 1914017), (77, 273431), (127, 165781), (889, 23683), (1397, 15071), (2153, 9779)]