19871397

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1277}}^1$

素因数の和:1322

約数の個数: 48

約数和(自身を含む): 37215360

約数和(自身を除く): 17343963

約数列:

[1, 3, 7, 9, 13, 19, 21, 39, 57, 63, 91, 117, 133, 171, 247, 273, 399, 741, 819, 1197, 1277, 1729, 2223, 3831, 5187, 8939, 11493, 15561, 16601, 24263, 26817, 49803, 72789, 80451, 116207, 149409, 169841, 218367, 315419, 348621, 509523, 946257, 1045863, 1528569, 2207933, 2838771, 6623799, 19871397]

約数ペア:

[(1, 19871397), (3, 6623799), (7, 2838771), (9, 2207933), (13, 1528569), (19, 1045863), (21, 946257), (39, 509523), (57, 348621), (63, 315419), (91, 218367), (117, 169841), (133, 149409), (171, 116207), (247, 80451), (273, 72789), (399, 49803), (741, 26817), (819, 24263), (1197, 16601), (1277, 15561), (1729, 11493), (2223, 8939), (3831, 5187)]