256486257

素因数分解:

$3^6\times {\mathrm{37}}^2\times {\mathrm{257}}^1$

素因数の和:349

約数の個数: 42

約数和(自身を含む): 396765558

約数和(自身を除く): 140279301

約数列:

[1, 3, 9, 27, 37, 81, 111, 243, 257, 333, 729, 771, 999, 1369, 2313, 2997, 4107, 6939, 8991, 9509, 12321, 20817, 26973, 28527, 36963, 62451, 85581, 110889, 187353, 256743, 332667, 351833, 770229, 998001, 1055499, 2310687, 3166497, 6932061, 9499491, 28498473, 85495419, 256486257]

約数ペア:

[(1, 256486257), (3, 85495419), (9, 28498473), (27, 9499491), (37, 6932061), (81, 3166497), (111, 2310687), (243, 1055499), (257, 998001), (333, 770229), (729, 351833), (771, 332667), (999, 256743), (1369, 187353), (2313, 110889), (2997, 85581), (4107, 62451), (6939, 36963), (8991, 28527), (9509, 26973), (12321, 20817)]