21991304

素因数分解:

$2^3\times {\mathrm{157}}^1\times {\mathrm{17509}}^1$

素因数の和:17672

約数の個数: 16

約数和(自身を含む): 41498700

約数和(自身を除く): 19507396

約数列:

[1, 2, 4, 8, 157, 314, 628, 1256, 17509, 35018, 70036, 140072, 2748913, 5497826, 10995652, 21991304]

約数ペア:

[(1, 21991304), (2, 10995652), (4, 5497826), (8, 2748913), (157, 140072), (314, 70036), (628, 35018), (1256, 17509)]