21687556

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{44809}}^1$

素因数の和:44835

約数の個数: 18

約数和(自身を含む): 41718110

約数和(自身を除く): 20030554

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 44809, 89618, 179236, 492899, 985798, 1971596, 5421889, 10843778, 21687556]

約数ペア:

[(1, 21687556), (2, 10843778), (4, 5421889), (11, 1971596), (22, 985798), (44, 492899), (121, 179236), (242, 89618), (484, 44809)]