18881541

素因数分解:

$3^2\times 7^1\times {\mathrm{107}}^1\times {\mathrm{2801}}^1$

素因数の和:2921

約数の個数: 24

約数和(自身を含む): 31472064

約数和(自身を除く): 12590523

約数列:

[1, 3, 7, 9, 21, 63, 107, 321, 749, 963, 2247, 2801, 6741, 8403, 19607, 25209, 58821, 176463, 299707, 899121, 2097949, 2697363, 6293847, 18881541]

約数ペア:

[(1, 18881541), (3, 6293847), (7, 2697363), (9, 2097949), (21, 899121), (63, 299707), (107, 176463), (321, 58821), (749, 25209), (963, 19607), (2247, 8403), (2801, 6741)]