21042136

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{61169}}^1$

素因数の和:61218

約数の個数: 16

約数和(自身を含む): 40372200

約数和(自身を除く): 19330064

約数列:

[1, 2, 4, 8, 43, 86, 172, 344, 61169, 122338, 244676, 489352, 2630267, 5260534, 10521068, 21042136]

約数ペア:

[(1, 21042136), (2, 10521068), (4, 5260534), (8, 2630267), (43, 489352), (86, 244676), (172, 122338), (344, 61169)]