21218956

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{4507}}^1$

素因数の和:4629

約数の個数: 24

約数和(自身を含む): 40896576

約数和(自身を除く): 19677620

約数列:

[1, 2, 4, 11, 22, 44, 107, 214, 428, 1177, 2354, 4507, 4708, 9014, 18028, 49577, 99154, 198308, 482249, 964498, 1928996, 5304739, 10609478, 21218956]

約数ペア:

[(1, 21218956), (2, 10609478), (4, 5304739), (11, 1928996), (22, 964498), (44, 482249), (107, 198308), (214, 99154), (428, 49577), (1177, 18028), (2354, 9014), (4507, 4708)]