80802580

素因数分解:

$2^2\times 5^1\times {\mathrm{4040129}}^1$

素因数の和:4040138

約数の個数: 12

約数和(自身を含む): 169685460

約数和(自身を除く): 88882880

約数列:

[1, 2, 4, 5, 10, 20, 4040129, 8080258, 16160516, 20200645, 40401290, 80802580]

約数ペア:

[(1, 80802580), (2, 40401290), (4, 20200645), (5, 16160516), (10, 8080258), (20, 4040129)]