21084778

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{107}}^1$

素因数の和:199

約数の個数: 48

約数和(自身を含む): 38421216

約数和(自身を除く): 17336438

約数列:

[1, 2, 11, 13, 22, 26, 53, 106, 107, 143, 169, 214, 286, 338, 583, 689, 1166, 1177, 1378, 1391, 1859, 2354, 2782, 3718, 5671, 7579, 8957, 11342, 15158, 15301, 17914, 18083, 30602, 36166, 62381, 73723, 98527, 124762, 147446, 197054, 198913, 397826, 810953, 958399, 1621906, 1916798, 10542389, 21084778]

約数ペア:

[(1, 21084778), (2, 10542389), (11, 1916798), (13, 1621906), (22, 958399), (26, 810953), (53, 397826), (106, 198913), (107, 197054), (143, 147446), (169, 124762), (214, 98527), (286, 73723), (338, 62381), (583, 36166), (689, 30602), (1166, 18083), (1177, 17914), (1378, 15301), (1391, 15158), (1859, 11342), (2354, 8957), (2782, 7579), (3718, 5671)]