21705165

素因数分解:

$3^4\times 5^1\times {\mathrm{53593}}^1$

素因数の和:53610

約数の個数: 20

約数和(自身を含む): 38909244

約数和(自身を除く): 17204079

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53593, 160779, 267965, 482337, 803895, 1447011, 2411685, 4341033, 7235055, 21705165]

約数ペア:

[(1, 21705165), (3, 7235055), (5, 4341033), (9, 2411685), (15, 1447011), (27, 803895), (45, 482337), (81, 267965), (135, 160779), (405, 53593)]