21152978

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{12487}}^1$

素因数の和:12518

約数の個数: 24

約数和(自身を含む): 39861696

約数和(自身を除く): 18708718

約数列:

[1, 2, 7, 11, 14, 22, 77, 121, 154, 242, 847, 1694, 12487, 24974, 87409, 137357, 174818, 274714, 961499, 1510927, 1922998, 3021854, 10576489, 21152978]

約数ペア:

[(1, 21152978), (2, 10576489), (7, 3021854), (11, 1922998), (14, 1510927), (22, 961499), (77, 274714), (121, 174818), (154, 137357), (242, 87409), (847, 24974), (1694, 12487)]