21000691756

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43389859}}^1$

素因数の和:43389885

約数の個数: 18

約数和(自身を含む): 40395959660

約数和(自身を除く): 19395267904

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 43389859, 86779718, 173559436, 477288449, 954576898, 1909153796, 5250172939, 10500345878, 21000691756]

約数ペア:

[(1, 21000691756), (2, 10500345878), (4, 5250172939), (11, 1909153796), (22, 954576898), (44, 477288449), (121, 173559436), (242, 86779718), (484, 43389859)]