18797821

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{331}}^1$

素因数の和:425

約数の個数: 24

約数和(自身を含む): 23465760

約数和(自身を除く): 4667939

約数列:

[1, 7, 19, 49, 61, 133, 331, 427, 931, 1159, 2317, 2989, 6289, 8113, 16219, 20191, 44023, 56791, 141337, 308161, 383629, 989359, 2685403, 18797821]

約数ペア:

[(1, 18797821), (7, 2685403), (19, 989359), (49, 383629), (61, 308161), (133, 141337), (331, 56791), (427, 44023), (931, 20191), (1159, 16219), (2317, 8113), (2989, 6289)]