21919876

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{45289}}^1$

素因数の和:45315

約数の個数: 18

約数和(自身を含む): 42164990

約数和(自身を除く): 20245114

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 45289, 90578, 181156, 498179, 996358, 1992716, 5479969, 10959938, 21919876]

約数ペア:

[(1, 21919876), (2, 10959938), (4, 5479969), (11, 1992716), (22, 996358), (44, 498179), (121, 181156), (242, 90578), (484, 45289)]