19754889

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{643}}^1$

素因数の和:690

約数の個数: 48

約数和(自身を含む): 35239680

約数和(自身を除く): 15484791

約数列:

[1, 3, 7, 11, 19, 21, 33, 49, 57, 77, 133, 147, 209, 231, 399, 539, 627, 643, 931, 1463, 1617, 1929, 2793, 4389, 4501, 7073, 10241, 12217, 13503, 21219, 30723, 31507, 36651, 49511, 85519, 94521, 134387, 148533, 256557, 346577, 403161, 598633, 940709, 1039731, 1795899, 2822127, 6584963, 19754889]

約数ペア:

[(1, 19754889), (3, 6584963), (7, 2822127), (11, 1795899), (19, 1039731), (21, 940709), (33, 598633), (49, 403161), (57, 346577), (77, 256557), (133, 148533), (147, 134387), (209, 94521), (231, 85519), (399, 49511), (539, 36651), (627, 31507), (643, 30723), (931, 21219), (1463, 13503), (1617, 12217), (1929, 10241), (2793, 7073), (4389, 4501)]