20998593

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{193}}^1$

素因数の和:374

約数の個数: 48

約数和(自身を含む): 38253696

約数和(自身を除く): 17255103

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 157, 193, 231, 471, 579, 693, 1099, 1351, 1413, 1727, 1737, 2123, 3297, 4053, 5181, 6369, 9891, 12089, 12159, 14861, 15543, 19107, 30301, 36267, 44583, 90903, 108801, 133749, 212107, 272709, 333311, 636321, 999933, 1908963, 2333177, 2999799, 6999531, 20998593]

約数ペア:

[(1, 20998593), (3, 6999531), (7, 2999799), (9, 2333177), (11, 1908963), (21, 999933), (33, 636321), (63, 333311), (77, 272709), (99, 212107), (157, 133749), (193, 108801), (231, 90903), (471, 44583), (579, 36267), (693, 30301), (1099, 19107), (1351, 15543), (1413, 14861), (1727, 12159), (1737, 12089), (2123, 9891), (3297, 6369), (4053, 5181)]