20981807

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{6337}}^1$

素因数の和:6398

約数の個数: 16

約数和(自身を含む): 26771712

約数和(自身を除く): 5789905

約数列:

[1, 7, 11, 43, 77, 301, 473, 3311, 6337, 44359, 69707, 272491, 487949, 1907437, 2997401, 20981807]

約数ペア:

[(1, 20981807), (7, 2997401), (11, 1907437), (43, 487949), (77, 272491), (301, 69707), (473, 44359), (3311, 6337)]