21070916

素因数分解:

$2^2\times {\mathrm{103}}^1\times {\mathrm{199}}^1\times {\mathrm{257}}^1$

素因数の和:563

約数の個数: 24

約数和(自身を含む): 37564800

約数和(自身を除く): 16493884

約数列:

[1, 2, 4, 103, 199, 206, 257, 398, 412, 514, 796, 1028, 20497, 26471, 40994, 51143, 52942, 81988, 102286, 105884, 204572, 5267729, 10535458, 21070916]

約数ペア:

[(1, 21070916), (2, 10535458), (4, 5267729), (103, 204572), (199, 105884), (206, 102286), (257, 81988), (398, 52942), (412, 51143), (514, 40994), (796, 26471), (1028, 20497)]