20981002

素因数分解:

$2^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{10939}}^1$

素因数の和:11085

約数の個数: 16

約数和(自身を含む): 36233280

約数和(自身を除く): 15252278

約数列:

[1, 2, 7, 14, 137, 274, 959, 1918, 10939, 21878, 76573, 153146, 1498643, 2997286, 10490501, 20981002]

約数ペア:

[(1, 20981002), (2, 10490501), (7, 2997286), (14, 1498643), (137, 153146), (274, 76573), (959, 21878), (1918, 10939)]