21721436

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{44879}}^1$

素因数の和:44905

約数の個数: 18

約数和(自身を含む): 41783280

約数和(自身を除く): 20061844

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 44879, 89758, 179516, 493669, 987338, 1974676, 5430359, 10860718, 21721436]

約数ペア:

[(1, 21721436), (2, 10860718), (4, 5430359), (11, 1974676), (22, 987338), (44, 493669), (121, 179516), (242, 89758), (484, 44879)]