21045040

素因数分解:

$2^4\times 5^1\times {\mathrm{263063}}^1$

素因数の和:263076

約数の個数: 20

約数和(自身を含む): 48929904

約数和(自身を除く): 27884864

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263063, 526126, 1052252, 1315315, 2104504, 2630630, 4209008, 5261260, 10522520, 21045040]

約数ペア:

[(1, 21045040), (2, 10522520), (4, 5261260), (5, 4209008), (8, 2630630), (10, 2104504), (16, 1315315), (20, 1052252), (40, 526126), (80, 263063)]