21287651

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{613}}^1$

素因数の和:683

約数の個数: 24

約数和(自身を含む): 27438432

約数和(自身を除く): 6150781

約数列:

[1, 7, 11, 41, 77, 121, 287, 451, 613, 847, 3157, 4291, 4961, 6743, 25133, 34727, 47201, 74173, 175931, 276463, 519211, 1935241, 3041093, 21287651]

約数ペア:

[(1, 21287651), (7, 3041093), (11, 1935241), (41, 519211), (77, 276463), (121, 175931), (287, 74173), (451, 47201), (613, 34727), (847, 25133), (3157, 6743), (4291, 4961)]