20902707

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{673}}^1$

素因数の和:732

約数の個数: 48

約数和(自身を含む): 37851840

約数和(自身を除く): 16949133

約数列:

[1, 3, 7, 9, 17, 21, 29, 51, 63, 87, 119, 153, 203, 261, 357, 493, 609, 673, 1071, 1479, 1827, 2019, 3451, 4437, 4711, 6057, 10353, 11441, 14133, 19517, 31059, 34323, 42399, 58551, 80087, 102969, 136619, 175653, 240261, 331789, 409857, 720783, 995367, 1229571, 2322523, 2986101, 6967569, 20902707]

約数ペア:

[(1, 20902707), (3, 6967569), (7, 2986101), (9, 2322523), (17, 1229571), (21, 995367), (29, 720783), (51, 409857), (63, 331789), (87, 240261), (119, 175653), (153, 136619), (203, 102969), (261, 80087), (357, 58551), (493, 42399), (609, 34323), (673, 31059), (1071, 19517), (1479, 14133), (1827, 11441), (2019, 10353), (3451, 6057), (4437, 4711)]