661520

素因数分解:

$2^4\times 5^1\times {\mathrm{8269}}^1$

素因数の和:8282

約数の個数: 20

約数和(自身を含む): 1538220

約数和(自身を除く): 876700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8269, 16538, 33076, 41345, 66152, 82690, 132304, 165380, 330760, 661520]

約数ペア:

[(1, 661520), (2, 330760), (4, 165380), (5, 132304), (8, 82690), (10, 66152), (16, 41345), (20, 33076), (40, 16538), (80, 8269)]