81904921

素因数分解:

$7^2\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{691}}^1$

素因数の和:805

約数の個数: 24

約数和(自身を含む): 99398880

約数和(自身を除く): 17493959

約数列:

[1, 7, 41, 49, 59, 287, 413, 691, 2009, 2419, 2891, 4837, 16933, 28331, 33859, 40769, 118531, 198317, 285383, 1388219, 1671529, 1997681, 11700703, 81904921]

約数ペア:

[(1, 81904921), (7, 11700703), (41, 1997681), (49, 1671529), (59, 1388219), (287, 285383), (413, 198317), (691, 118531), (2009, 40769), (2419, 33859), (2891, 28331), (4837, 16933)]