21241040

素因数分解:

$2^4\times 5^1\times {\mathrm{265513}}^1$

素因数の和:265526

約数の個数: 20

約数和(自身を含む): 49385604

約数和(自身を除く): 28144564

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 265513, 531026, 1062052, 1327565, 2124104, 2655130, 4248208, 5310260, 10620520, 21241040]

約数ペア:

[(1, 21241040), (2, 10620520), (4, 5310260), (5, 4248208), (8, 2655130), (10, 2124104), (16, 1327565), (20, 1062052), (40, 531026), (80, 265513)]