257411511

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{140893}}^1$

素因数の和:140935

約数の個数: 24

約数和(自身を含む): 439589280

約数和(自身を除く): 182177769

約数列:

[1, 3, 7, 9, 21, 29, 63, 87, 203, 261, 609, 1827, 140893, 422679, 986251, 1268037, 2958753, 4085897, 8876259, 12257691, 28601279, 36773073, 85803837, 257411511]

約数ペア:

[(1, 257411511), (3, 85803837), (7, 36773073), (9, 28601279), (21, 12257691), (29, 8876259), (63, 4085897), (87, 2958753), (203, 1268037), (261, 986251), (609, 422679), (1827, 140893)]