21302211

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{263}}^1$

素因数の和:328

約数の個数: 48

約数和(自身を含む): 36115200

約数和(自身を除く): 14812989

約数列:

[1, 3, 7, 19, 21, 29, 49, 57, 87, 133, 147, 203, 263, 399, 551, 609, 789, 931, 1421, 1653, 1841, 2793, 3857, 4263, 4997, 5523, 7627, 11571, 12887, 14991, 22881, 26999, 34979, 38661, 53389, 80997, 104937, 144913, 160167, 244853, 373723, 434739, 734559, 1014391, 1121169, 3043173, 7100737, 21302211]

約数ペア:

[(1, 21302211), (3, 7100737), (7, 3043173), (19, 1121169), (21, 1014391), (29, 734559), (49, 434739), (57, 373723), (87, 244853), (133, 160167), (147, 144913), (203, 104937), (263, 80997), (399, 53389), (551, 38661), (609, 34979), (789, 26999), (931, 22881), (1421, 14991), (1653, 12887), (1841, 11571), (2793, 7627), (3857, 5523), (4263, 4997)]