21047445

素因数分解:

$3^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{1019}}^1$

素因数の和:1056

約数の個数: 48

約数和(自身を含む): 40098240

約数和(自身を除く): 19050795

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 81, 85, 135, 153, 243, 255, 405, 459, 765, 1019, 1215, 1377, 2295, 3057, 4131, 5095, 6885, 9171, 15285, 17323, 20655, 27513, 45855, 51969, 82539, 86615, 137565, 155907, 247617, 259845, 412695, 467721, 779535, 1238085, 1403163, 2338605, 4209489, 7015815, 21047445]

約数ペア:

[(1, 21047445), (3, 7015815), (5, 4209489), (9, 2338605), (15, 1403163), (17, 1238085), (27, 779535), (45, 467721), (51, 412695), (81, 259845), (85, 247617), (135, 155907), (153, 137565), (243, 86615), (255, 82539), (405, 51969), (459, 45855), (765, 27513), (1019, 20655), (1215, 17323), (1377, 15285), (2295, 9171), (3057, 6885), (4131, 5095)]