399176336

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{1997}}^1$

素因数の和:2080

約数の個数: 60

約数和(自身を含む): 861062076

約数和(自身を除く): 461885740

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 52, 62, 104, 124, 208, 248, 403, 496, 806, 961, 1612, 1922, 1997, 3224, 3844, 3994, 6448, 7688, 7988, 12493, 15376, 15976, 24986, 25961, 31952, 49972, 51922, 61907, 99944, 103844, 123814, 199888, 207688, 247628, 415376, 495256, 804791, 990512, 1609582, 1919117, 3219164, 3838234, 6438328, 7676468, 12876656, 15352936, 24948521, 30705872, 49897042, 99794084, 199588168, 399176336]

約数ペア:

[(1, 399176336), (2, 199588168), (4, 99794084), (8, 49897042), (13, 30705872), (16, 24948521), (26, 15352936), (31, 12876656), (52, 7676468), (62, 6438328), (104, 3838234), (124, 3219164), (208, 1919117), (248, 1609582), (403, 990512), (496, 804791), (806, 495256), (961, 415376), (1612, 247628), (1922, 207688), (1997, 199888), (3224, 123814), (3844, 103844), (3994, 99944), (6448, 61907), (7688, 51922), (7988, 49972), (12493, 31952), (15376, 25961), (15976, 24986)]