20675440

素因数分解:

$2^4\times 5^1\times {\mathrm{258443}}^1$

素因数の和:258456

約数の個数: 20

約数和(自身を含む): 48070584

約数和(自身を除く): 27395144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258443, 516886, 1033772, 1292215, 2067544, 2584430, 4135088, 5168860, 10337720, 20675440]

約数ペア:

[(1, 20675440), (2, 10337720), (4, 5168860), (5, 4135088), (8, 2584430), (10, 2067544), (16, 1292215), (20, 1033772), (40, 516886), (80, 258443)]