81761841

素因数分解:

$3^2\times 7^2\times {\mathrm{185401}}^1$

素因数の和:185421

約数の個数: 18

約数和(自身を含む): 137382882

約数和(自身を除く): 55621041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 185401, 556203, 1297807, 1668609, 3893421, 9084649, 11680263, 27253947, 81761841]

約数ペア:

[(1, 81761841), (3, 27253947), (7, 11680263), (9, 9084649), (21, 3893421), (49, 1668609), (63, 1297807), (147, 556203), (441, 185401)]