257985

素因数分解:

$3^4\times 5^1\times 7^2\times {\mathrm{13}}^1$

素因数の和:44

約数の個数: 60

約数和(自身を含む): 579348

約数和(自身を除く): 321363

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 27, 35, 39, 45, 49, 63, 65, 81, 91, 105, 117, 135, 147, 189, 195, 245, 273, 315, 351, 405, 441, 455, 567, 585, 637, 735, 819, 945, 1053, 1323, 1365, 1755, 1911, 2205, 2457, 2835, 3185, 3969, 4095, 5265, 5733, 6615, 7371, 9555, 12285, 17199, 19845, 28665, 36855, 51597, 85995, 257985]

約数ペア:

[(1, 257985), (3, 85995), (5, 51597), (7, 36855), (9, 28665), (13, 19845), (15, 17199), (21, 12285), (27, 9555), (35, 7371), (39, 6615), (45, 5733), (49, 5265), (63, 4095), (65, 3969), (81, 3185), (91, 2835), (105, 2457), (117, 2205), (135, 1911), (147, 1755), (189, 1365), (195, 1323), (245, 1053), (273, 945), (315, 819), (351, 735), (405, 637), (441, 585), (455, 567)]