21038384

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77347}}^1$

素因数の和:77372

約数の個数: 20

約数和(自身を含む): 43160184

約数和(自身を除く): 22121800

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77347, 154694, 309388, 618776, 1237552, 1314899, 2629798, 5259596, 10519192, 21038384]

約数ペア:

[(1, 21038384), (2, 10519192), (4, 5259596), (8, 2629798), (16, 1314899), (17, 1237552), (34, 618776), (68, 309388), (136, 154694), (272, 77347)]