21028131

素因数分解:

$3^2\times {\mathrm{59}}^1\times {\mathrm{199}}^2$

素因数の和:463

約数の個数: 18

約数和(自身を含む): 31044780

約数和(自身を除く): 10016649

約数列:

[1, 3, 9, 59, 177, 199, 531, 597, 1791, 11741, 35223, 39601, 105669, 118803, 356409, 2336459, 7009377, 21028131]

約数ペア:

[(1, 21028131), (3, 7009377), (9, 2336459), (59, 356409), (177, 118803), (199, 105669), (531, 39601), (597, 35223), (1791, 11741)]