19779280

素因数分解:

$2^4\times 5^1\times {\mathrm{247241}}^1$

素因数の和:247254

約数の個数: 20

約数和(自身を含む): 45987012

約数和(自身を除く): 26207732

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247241, 494482, 988964, 1236205, 1977928, 2472410, 3955856, 4944820, 9889640, 19779280]

約数ペア:

[(1, 19779280), (2, 9889640), (4, 4944820), (5, 3955856), (8, 2472410), (10, 1977928), (16, 1236205), (20, 988964), (40, 494482), (80, 247241)]