639745916

素因数分解:

$2^2\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{128257}}^1$

素因数の和:128333

約数の個数: 24

約数和(自身を含む): 1185103920

約数和(自身を除く): 545358004

約数列:

[1, 2, 4, 29, 43, 58, 86, 116, 172, 1247, 2494, 4988, 128257, 256514, 513028, 3719453, 5515051, 7438906, 11030102, 14877812, 22060204, 159936479, 319872958, 639745916]

約数ペア:

[(1, 639745916), (2, 319872958), (4, 159936479), (29, 22060204), (43, 14877812), (58, 11030102), (86, 7438906), (116, 5515051), (172, 3719453), (1247, 513028), (2494, 256514), (4988, 128257)]