81681985

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{212161}}^1$

素因数の和:212184

約数の個数: 16

約数和(自身を含む): 122205312

約数和(自身を除く): 40523327

約数列:

[1, 5, 7, 11, 35, 55, 77, 385, 212161, 1060805, 1485127, 2333771, 7425635, 11668855, 16336397, 81681985]

約数ペア:

[(1, 81681985), (5, 16336397), (7, 11668855), (11, 7425635), (35, 2333771), (55, 1485127), (77, 1060805), (385, 212161)]