20685861

素因数分解:

$3^5\times 7^1\times {\mathrm{12161}}^1$

素因数の和:12183

約数の個数: 24

約数和(自身を含む): 35415744

約数和(自身を除く): 14729883

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 1701, 12161, 36483, 85127, 109449, 255381, 328347, 766143, 985041, 2298429, 2955123, 6895287, 20685861]

約数ペア:

[(1, 20685861), (3, 6895287), (7, 2955123), (9, 2298429), (21, 985041), (27, 766143), (63, 328347), (81, 255381), (189, 109449), (243, 85127), (567, 36483), (1701, 12161)]