21049328

素因数分解:

$2^4\times {\mathrm{257}}^1\times {\mathrm{5119}}^1$

素因数の和:5384

約数の個数: 20

約数和(自身を含む): 40949760

約数和(自身を除く): 19900432

約数列:

[1, 2, 4, 8, 16, 257, 514, 1028, 2056, 4112, 5119, 10238, 20476, 40952, 81904, 1315583, 2631166, 5262332, 10524664, 21049328]

約数ペア:

[(1, 21049328), (2, 10524664), (4, 5262332), (8, 2631166), (16, 1315583), (257, 81904), (514, 40952), (1028, 20476), (2056, 10238), (4112, 5119)]