257680

素因数分解:

$2^4\times 5^1\times {\mathrm{3221}}^1$

素因数の和:3234

約数の個数: 20

約数和(自身を含む): 599292

約数和(自身を除く): 341612

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 3221, 6442, 12884, 16105, 25768, 32210, 51536, 64420, 128840, 257680]

約数ペア:

[(1, 257680), (2, 128840), (4, 64420), (5, 51536), (8, 32210), (10, 25768), (16, 16105), (20, 12884), (40, 6442), (80, 3221)]