21595815

素因数分解:

$3^4\times 5^1\times {\mathrm{53323}}^1$

素因数の和:53340

約数の個数: 20

約数和(自身を含む): 38713224

約数和(自身を除く): 17117409

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53323, 159969, 266615, 479907, 799845, 1439721, 2399535, 4319163, 7198605, 21595815]

約数ペア:

[(1, 21595815), (3, 7198605), (5, 4319163), (9, 2399535), (15, 1439721), (27, 799845), (45, 479907), (81, 266615), (135, 159969), (405, 53323)]