640924417

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{43}}^2\times {\mathrm{2153}}^1$

素因数の和:2269

約数の個数: 24

約数和(自身を含む): 782884224

約数和(自身を除く): 141959807

約数列:

[1, 7, 23, 43, 161, 301, 989, 1849, 2153, 6923, 12943, 15071, 42527, 49519, 92579, 297689, 346633, 648053, 2129317, 3980897, 14905219, 27866279, 91560631, 640924417]

約数ペア:

[(1, 640924417), (7, 91560631), (23, 27866279), (43, 14905219), (161, 3980897), (301, 2129317), (989, 648053), (1849, 346633), (2153, 297689), (6923, 92579), (12943, 49519), (15071, 42527)]