21288105

素因数分解:

$3^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{4877}}^1$

素因数の和:4985

約数の個数: 24

約数和(自身を含む): 37287432

約数和(自身を除く): 15999327

約数列:

[1, 3, 5, 9, 15, 45, 97, 291, 485, 873, 1455, 4365, 4877, 14631, 24385, 43893, 73155, 219465, 473069, 1419207, 2365345, 4257621, 7096035, 21288105]

約数ペア:

[(1, 21288105), (3, 7096035), (5, 4257621), (9, 2365345), (15, 1419207), (45, 473069), (97, 219465), (291, 73155), (485, 43893), (873, 24385), (1455, 14631), (4365, 4877)]