20565520

素因数分解:

$2^4\times 5^1\times {\mathrm{257069}}^1$

素因数の和:257082

約数の個数: 20

約数和(自身を含む): 47815020

約数和(自身を除く): 27249500

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 257069, 514138, 1028276, 1285345, 2056552, 2570690, 4113104, 5141380, 10282760, 20565520]

約数ペア:

[(1, 20565520), (2, 10282760), (4, 5141380), (5, 4113104), (8, 2570690), (10, 2056552), (16, 1285345), (20, 1028276), (40, 514138), (80, 257069)]