21158128

素因数分解:

$2^4\times {\mathrm{641}}^1\times {\mathrm{2063}}^1$

素因数の和:2712

約数の個数: 20

約数和(自身を含む): 41077728

約数和(自身を除く): 19919600

約数列:

[1, 2, 4, 8, 16, 641, 1282, 2063, 2564, 4126, 5128, 8252, 10256, 16504, 33008, 1322383, 2644766, 5289532, 10579064, 21158128]

約数ペア:

[(1, 21158128), (2, 10579064), (4, 5289532), (8, 2644766), (16, 1322383), (641, 33008), (1282, 16504), (2063, 10256), (2564, 8252), (4126, 5128)]