261755991

素因数分解:

$3^2\times 7^3\times {\mathrm{84793}}^1$

素因数の和:84820

約数の個数: 24

約数和(自身を含む): 440928800

約数和(自身を除く): 179172809

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 1029, 3087, 84793, 254379, 593551, 763137, 1780653, 4154857, 5341959, 12464571, 29083999, 37393713, 87251997, 261755991]

約数ペア:

[(1, 261755991), (3, 87251997), (7, 37393713), (9, 29083999), (21, 12464571), (49, 5341959), (63, 4154857), (147, 1780653), (343, 763137), (441, 593551), (1029, 254379), (3087, 84793)]