21146818

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{353}}^1\times {\mathrm{389}}^1$

素因数の和:762

約数の個数: 32

約数和(自身を含む): 39761280

約数和(自身を除く): 18614462

約数列:

[1, 2, 7, 11, 14, 22, 77, 154, 353, 389, 706, 778, 2471, 2723, 3883, 4279, 4942, 5446, 7766, 8558, 27181, 29953, 54362, 59906, 137317, 274634, 961219, 1510487, 1922438, 3020974, 10573409, 21146818]

約数ペア:

[(1, 21146818), (2, 10573409), (7, 3020974), (11, 1922438), (14, 1510487), (22, 961219), (77, 274634), (154, 137317), (353, 59906), (389, 54362), (706, 29953), (778, 27181), (2471, 8558), (2723, 7766), (3883, 5446), (4279, 4942)]