218790512642

素因数分解:

$2^1\times {\mathrm{13}}^2\times {\mathrm{647309209}}^1$

素因数の和:647309237

約数の個数: 12

約数和(自身を含む): 355372756290

約数和(自身を除く): 136582243648

約数列:

[1, 2, 13, 26, 169, 338, 647309209, 1294618418, 8415019717, 16830039434, 109395256321, 218790512642]

約数ペア:

[(1, 218790512642), (2, 109395256321), (13, 16830039434), (26, 8415019717), (169, 1294618418), (338, 647309209)]