21808845

素因数分解:

$3^4\times 5^1\times {\mathrm{53849}}^1$

素因数の和:53866

約数の個数: 20

約数和(自身を含む): 39095100

約数和(自身を除く): 17286255

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53849, 161547, 269245, 484641, 807735, 1453923, 2423205, 4361769, 7269615, 21808845]

約数ペア:

[(1, 21808845), (3, 7269615), (5, 4361769), (9, 2423205), (15, 1453923), (27, 807735), (45, 484641), (81, 269245), (135, 161547), (405, 53849)]