21114640

素因数分解:

$2^4\times 5^1\times {\mathrm{263933}}^1$

素因数の和:263946

約数の個数: 20

約数和(自身を含む): 49091724

約数和(自身を除く): 27977084

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263933, 527866, 1055732, 1319665, 2111464, 2639330, 4222928, 5278660, 10557320, 21114640]

約数ペア:

[(1, 21114640), (2, 10557320), (4, 5278660), (5, 4222928), (8, 2639330), (10, 2111464), (16, 1319665), (20, 1055732), (40, 527866), (80, 263933)]