21194747

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{73}}^1$

素因数の和:195

約数の個数: 32

約数和(自身を含む): 26995200

約数和(自身を除く): 5800453

約数列:

[1, 7, 19, 37, 59, 73, 133, 259, 413, 511, 703, 1121, 1387, 2183, 2701, 4307, 4921, 7847, 9709, 15281, 18907, 30149, 41477, 51319, 81833, 159359, 290339, 359233, 572831, 1115513, 3027821, 21194747]

約数ペア:

[(1, 21194747), (7, 3027821), (19, 1115513), (37, 572831), (59, 359233), (73, 290339), (133, 159359), (259, 81833), (413, 51319), (511, 41477), (703, 30149), (1121, 18907), (1387, 15281), (2183, 9709), (2701, 7847), (4307, 4921)]