21981555

素因数分解:

$3^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{739}}^1$

素因数の和:1411

約数の個数: 24

約数和(自身を含む): 38210640

約数和(自身を除く): 16229085

約数列:

[1, 3, 5, 9, 15, 45, 661, 739, 1983, 2217, 3305, 3695, 5949, 6651, 9915, 11085, 29745, 33255, 488479, 1465437, 2442395, 4396311, 7327185, 21981555]

約数ペア:

[(1, 21981555), (3, 7327185), (5, 4396311), (9, 2442395), (15, 1465437), (45, 488479), (661, 33255), (739, 29745), (1983, 11085), (2217, 9915), (3305, 6651), (3695, 5949)]