21480856

素因数分解:

$2^3\times {\mathrm{103}}^1\times {\mathrm{131}}^1\times {\mathrm{199}}^1$

素因数の和:439

約数の個数: 32

約数和(自身を含む): 41184000

約数和(自身を除く): 19703144

約数列:

[1, 2, 4, 8, 103, 131, 199, 206, 262, 398, 412, 524, 796, 824, 1048, 1592, 13493, 20497, 26069, 26986, 40994, 52138, 53972, 81988, 104276, 107944, 163976, 208552, 2685107, 5370214, 10740428, 21480856]

約数ペア:

[(1, 21480856), (2, 10740428), (4, 5370214), (8, 2685107), (103, 208552), (131, 163976), (199, 107944), (206, 104276), (262, 81988), (398, 53972), (412, 52138), (524, 40994), (796, 26986), (824, 26069), (1048, 20497), (1592, 13493)]