257156739

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{240109}}^1$

素因数の和:240139

約数の個数: 24

約数和(自身を含む): 449485920

約数和(自身を除く): 192329181

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 240109, 720327, 1680763, 2160981, 4081853, 5042289, 12245559, 15126867, 28572971, 36736677, 85718913, 257156739]

約数ペア:

[(1, 257156739), (3, 85718913), (7, 36736677), (9, 28572971), (17, 15126867), (21, 12245559), (51, 5042289), (63, 4081853), (119, 2160981), (153, 1680763), (357, 720327), (1071, 240109)]