21242276

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43889}}^1$

素因数の和:43915

約数の個数: 18

約数和(自身を含む): 40861590

約数和(自身を除く): 19619314

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 43889, 87778, 175556, 482779, 965558, 1931116, 5310569, 10621138, 21242276]

約数ペア:

[(1, 21242276), (2, 10621138), (4, 5310569), (11, 1931116), (22, 965558), (44, 482779), (121, 175556), (242, 87778), (484, 43889)]