21005887

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{3673}}^1$

素因数の和:3742

約数の個数: 16

約数和(自身を含む): 25864960

約数和(自身を除く): 4859073

約数列:

[1, 7, 19, 43, 133, 301, 817, 3673, 5719, 25711, 69787, 157939, 488509, 1105573, 3000841, 21005887]

約数ペア:

[(1, 21005887), (7, 3000841), (19, 1105573), (43, 488509), (133, 157939), (301, 69787), (817, 25711), (3673, 5719)]