21643605

素因数分解:

$3^4\times 5^1\times {\mathrm{53441}}^1$

素因数の和:53458

約数の個数: 20

約数和(自身を含む): 38798892

約数和(自身を除く): 17155287

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53441, 160323, 267205, 480969, 801615, 1442907, 2404845, 4328721, 7214535, 21643605]

約数ペア:

[(1, 21643605), (3, 7214535), (5, 4328721), (9, 2404845), (15, 1442907), (27, 801615), (45, 480969), (81, 267205), (135, 160323), (405, 53441)]