21978608

素因数分解:

$2^4\times {\mathrm{641}}^1\times {\mathrm{2143}}^1$

素因数の和:2792

約数の個数: 20

約数和(自身を含む): 42669888

約数和(自身を除く): 20691280

約数列:

[1, 2, 4, 8, 16, 641, 1282, 2143, 2564, 4286, 5128, 8572, 10256, 17144, 34288, 1373663, 2747326, 5494652, 10989304, 21978608]

約数ペア:

[(1, 21978608), (2, 10989304), (4, 5494652), (8, 2747326), (16, 1373663), (641, 34288), (1282, 17144), (2143, 10256), (2564, 8572), (4286, 5128)]