21000906423

素因数分解:

$3^3\times 7^2\times {\mathrm{29}}^1\times {\mathrm{547369}}^1$

素因数の和:547421

約数の個数: 48

約数和(自身を含む): 37440108000

約数和(自身を除く): 16439201577

約数列:

[1, 3, 7, 9, 21, 27, 29, 49, 63, 87, 147, 189, 203, 261, 441, 609, 783, 1323, 1421, 1827, 4263, 5481, 12789, 38367, 547369, 1642107, 3831583, 4926321, 11494749, 14778963, 15873701, 26821081, 34484247, 47621103, 80463243, 103452741, 111115907, 142863309, 241389729, 333347721, 428589927, 724169187, 777811349, 1000043163, 2333434047, 3000129489, 7000302141, 21000906423]

約数ペア:

[(1, 21000906423), (3, 7000302141), (7, 3000129489), (9, 2333434047), (21, 1000043163), (27, 777811349), (29, 724169187), (49, 428589927), (63, 333347721), (87, 241389729), (147, 142863309), (189, 111115907), (203, 103452741), (261, 80463243), (441, 47621103), (609, 34484247), (783, 26821081), (1323, 15873701), (1421, 14778963), (1827, 11494749), (4263, 4926321), (5481, 3831583), (12789, 1642107), (38367, 547369)]