820287

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1$

素因数の和:85

約数の個数: 40

約数和(自身を含む): 1422960

約数和(自身を除く): 602673

約数列:

[1, 3, 9, 13, 19, 27, 39, 41, 57, 81, 117, 123, 171, 247, 351, 369, 513, 533, 741, 779, 1053, 1107, 1539, 1599, 2223, 2337, 3321, 4797, 6669, 7011, 10127, 14391, 20007, 21033, 30381, 43173, 63099, 91143, 273429, 820287]

約数ペア:

[(1, 820287), (3, 273429), (9, 91143), (13, 63099), (19, 43173), (27, 30381), (39, 21033), (41, 20007), (57, 14391), (81, 10127), (117, 7011), (123, 6669), (171, 4797), (247, 3321), (351, 2337), (369, 2223), (513, 1599), (533, 1539), (741, 1107), (779, 1053)]