81503120

素因数分解:

$2^4\times 5^1\times {\mathrm{1018789}}^1$

素因数の和:1018802

約数の個数: 20

約数和(自身を含む): 189494940

約数和(自身を除く): 107991820

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1018789, 2037578, 4075156, 5093945, 8150312, 10187890, 16300624, 20375780, 40751560, 81503120]

約数ペア:

[(1, 81503120), (2, 40751560), (4, 20375780), (5, 16300624), (8, 10187890), (10, 8150312), (16, 5093945), (20, 4075156), (40, 2037578), (80, 1018789)]