21071666

素因数分解:

$2^1\times 7^2\times {\mathrm{11}}^2\times {\mathrm{1777}}^1$

素因数の和:1815

約数の個数: 36

約数和(自身を含む): 40437054

約数和(自身を除く): 19365388

約数列:

[1, 2, 7, 11, 14, 22, 49, 77, 98, 121, 154, 242, 539, 847, 1078, 1694, 1777, 3554, 5929, 11858, 12439, 19547, 24878, 39094, 87073, 136829, 174146, 215017, 273658, 430034, 957803, 1505119, 1915606, 3010238, 10535833, 21071666]

約数ペア:

[(1, 21071666), (2, 10535833), (7, 3010238), (11, 1915606), (14, 1505119), (22, 957803), (49, 430034), (77, 273658), (98, 215017), (121, 174146), (154, 136829), (242, 87073), (539, 39094), (847, 24878), (1078, 19547), (1694, 12439), (1777, 11858), (3554, 5929)]