19765520

素因数分解:

$2^4\times 5^1\times {\mathrm{247069}}^1$

素因数の和:247082

約数の個数: 20

約数和(自身を含む): 45955020

約数和(自身を除く): 26189500

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247069, 494138, 988276, 1235345, 1976552, 2470690, 3953104, 4941380, 9882760, 19765520]

約数ペア:

[(1, 19765520), (2, 9882760), (4, 4941380), (5, 3953104), (8, 2470690), (10, 1976552), (16, 1235345), (20, 988276), (40, 494138), (80, 247069)]