21141520

素因数分解:

$2^4\times 5^1\times {\mathrm{264269}}^1$

素因数の和:264282

約数の個数: 20

約数和(自身を含む): 49154220

約数和(自身を除く): 28012700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 264269, 528538, 1057076, 1321345, 2114152, 2642690, 4228304, 5285380, 10570760, 21141520]

約数ペア:

[(1, 21141520), (2, 10570760), (4, 5285380), (5, 4228304), (8, 2642690), (10, 2114152), (16, 1321345), (20, 1057076), (40, 528538), (80, 264269)]