561897

素因数分解:

$3^4\times 7^1\times {\mathrm{991}}^1$

素因数の和:1010

約数の個数: 20

約数和(自身を含む): 960256

約数和(自身を除く): 398359

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 991, 2973, 6937, 8919, 20811, 26757, 62433, 80271, 187299, 561897]

約数ペア:

[(1, 561897), (3, 187299), (7, 80271), (9, 62433), (21, 26757), (27, 20811), (63, 8919), (81, 6937), (189, 2973), (567, 991)]