257984

素因数分解:

$2^6\times {\mathrm{29}}^1\times {\mathrm{139}}^1$

素因数の和:180

約数の個数: 28

約数和(自身を含む): 533400

約数和(自身を除く): 275416

約数列:

[1, 2, 4, 8, 16, 29, 32, 58, 64, 116, 139, 232, 278, 464, 556, 928, 1112, 1856, 2224, 4031, 4448, 8062, 8896, 16124, 32248, 64496, 128992, 257984]

約数ペア:

[(1, 257984), (2, 128992), (4, 64496), (8, 32248), (16, 16124), (29, 8896), (32, 8062), (58, 4448), (64, 4031), (116, 2224), (139, 1856), (232, 1112), (278, 928), (464, 556)]