21131803

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{61}}^1\times {\mathrm{409}}^1$

素因数の和:499

約数の個数: 24

約数和(自身を含む): 27046880

約数和(自身を除く): 5915077

約数列:

[1, 7, 11, 61, 77, 121, 409, 427, 671, 847, 2863, 4499, 4697, 7381, 24949, 31493, 49489, 51667, 174643, 274439, 346423, 1921073, 3018829, 21131803]

約数ペア:

[(1, 21131803), (7, 3018829), (11, 1921073), (61, 346423), (77, 274439), (121, 174643), (409, 51667), (427, 49489), (671, 31493), (847, 24949), (2863, 7381), (4499, 4697)]