21105520

素因数分解:

$2^4\times 5^1\times {\mathrm{263819}}^1$

素因数の和:263832

約数の個数: 20

約数和(自身を含む): 49070520

約数和(自身を除く): 27965000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263819, 527638, 1055276, 1319095, 2110552, 2638190, 4221104, 5276380, 10552760, 21105520]

約数ペア:

[(1, 21105520), (2, 10552760), (4, 5276380), (5, 4221104), (8, 2638190), (10, 2110552), (16, 1319095), (20, 1055276), (40, 527638), (80, 263819)]