21641985

素因数分解:

$3^4\times 5^1\times {\mathrm{53437}}^1$

素因数の和:53454

約数の個数: 20

約数和(自身を含む): 38795988

約数和(自身を除く): 17154003

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53437, 160311, 267185, 480933, 801555, 1442799, 2404665, 4328397, 7213995, 21641985]

約数ペア:

[(1, 21641985), (3, 7213995), (5, 4328397), (9, 2404665), (15, 1442799), (27, 801555), (45, 480933), (81, 267185), (135, 160311), (405, 53437)]