19986687

素因数分解:

$3^2\times 7^1\times {\mathrm{281}}^1\times {\mathrm{1129}}^1$

素因数の和:1423

約数の個数: 24

約数和(自身を含む): 33140640

約数和(自身を除く): 13153953

約数列:

[1, 3, 7, 9, 21, 63, 281, 843, 1129, 1967, 2529, 3387, 5901, 7903, 10161, 17703, 23709, 71127, 317249, 951747, 2220743, 2855241, 6662229, 19986687]

約数ペア:

[(1, 19986687), (3, 6662229), (7, 2855241), (9, 2220743), (21, 951747), (63, 317249), (281, 71127), (843, 23709), (1129, 17703), (1967, 10161), (2529, 7903), (3387, 5901)]