20661772

素因数分解:

$2^2\times {\mathrm{101}}^1\times {\mathrm{199}}^1\times {\mathrm{257}}^1$

素因数の和:561

約数の個数: 24

約数和(自身を含む): 36842400

約数和(自身を除く): 16180628

約数列:

[1, 2, 4, 101, 199, 202, 257, 398, 404, 514, 796, 1028, 20099, 25957, 40198, 51143, 51914, 80396, 102286, 103828, 204572, 5165443, 10330886, 20661772]

約数ペア:

[(1, 20661772), (2, 10330886), (4, 5165443), (101, 204572), (199, 103828), (202, 102286), (257, 80396), (398, 51914), (404, 51143), (514, 40198), (796, 25957), (1028, 20099)]