21193029

素因数分解:

$3^3\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{499}}^1$

素因数の和:543

約数の個数: 48

約数和(自身を含む): 37240000

約数和(自身を除く): 16046971

約数列:

[1, 3, 9, 11, 13, 27, 33, 39, 99, 117, 121, 143, 297, 351, 363, 429, 499, 1089, 1287, 1497, 1573, 3267, 3861, 4491, 4719, 5489, 6487, 13473, 14157, 16467, 19461, 42471, 49401, 58383, 60379, 71357, 148203, 175149, 181137, 214071, 543411, 642213, 784927, 1630233, 1926639, 2354781, 7064343, 21193029]

約数ペア:

[(1, 21193029), (3, 7064343), (9, 2354781), (11, 1926639), (13, 1630233), (27, 784927), (33, 642213), (39, 543411), (99, 214071), (117, 181137), (121, 175149), (143, 148203), (297, 71357), (351, 60379), (363, 58383), (429, 49401), (499, 42471), (1089, 19461), (1287, 16467), (1497, 14157), (1573, 13473), (3267, 6487), (3861, 5489), (4491, 4719)]