20661278

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{431}}^1\times {\mathrm{2179}}^1$

素因数の和:2623

約数の個数: 16

約数和(自身を含む): 33903360

約数和(自身を除く): 13242082

約数列:

[1, 2, 11, 22, 431, 862, 2179, 4358, 4741, 9482, 23969, 47938, 939149, 1878298, 10330639, 20661278]

約数ペア:

[(1, 20661278), (2, 10330639), (11, 1878298), (22, 939149), (431, 47938), (862, 23969), (2179, 9482), (4358, 4741)]