21169520

素因数分解:

$2^4\times 5^1\times {\mathrm{264619}}^1$

素因数の和:264632

約数の個数: 20

約数和(自身を含む): 49219320

約数和(自身を除く): 28049800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 264619, 529238, 1058476, 1323095, 2116952, 2646190, 4233904, 5292380, 10584760, 21169520]

約数ペア:

[(1, 21169520), (2, 10584760), (4, 5292380), (5, 4233904), (8, 2646190), (10, 2116952), (16, 1323095), (20, 1058476), (40, 529238), (80, 264619)]