21891429

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{8081}}^1$

素因数の和:8137

約数の個数: 24

約数和(自身を含む): 36983232

約数和(自身を除く): 15091803

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 8081, 24243, 56567, 72729, 169701, 347483, 509103, 1042449, 2432381, 3127347, 7297143, 21891429]

約数ペア:

[(1, 21891429), (3, 7297143), (7, 3127347), (9, 2432381), (21, 1042449), (43, 509103), (63, 347483), (129, 169701), (301, 72729), (387, 56567), (903, 24243), (2709, 8081)]