205121349520

素因数分解:

$2^4\times 5^1\times {\mathrm{2564016869}}^1$

素因数の和:2564016882

約数の個数: 20

約数和(自身を含む): 476907137820

約数和(自身を除く): 271785788300

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2564016869, 5128033738, 10256067476, 12820084345, 20512134952, 25640168690, 41024269904, 51280337380, 102560674760, 205121349520]

約数ペア:

[(1, 205121349520), (2, 102560674760), (4, 51280337380), (5, 41024269904), (8, 25640168690), (10, 20512134952), (16, 12820084345), (20, 10256067476), (40, 5128033738), (80, 2564016869)]