19221680

素因数分解:

$2^4\times 5^1\times {\mathrm{240271}}^1$

素因数の和:240284

約数の個数: 20

約数和(自身を含む): 44690592

約数和(自身を除く): 25468912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 240271, 480542, 961084, 1201355, 1922168, 2402710, 3844336, 4805420, 9610840, 19221680]

約数ペア:

[(1, 19221680), (2, 9610840), (4, 4805420), (5, 3844336), (8, 2402710), (10, 1922168), (16, 1201355), (20, 961084), (40, 480542), (80, 240271)]