780097940

素因数分解:

$2^2\times 5^1\times {\mathrm{39004897}}^1$

素因数の和:39004906

約数の個数: 12

約数和(自身を含む): 1638205716

約数和(自身を除く): 858107776

約数列:

[1, 2, 4, 5, 10, 20, 39004897, 78009794, 156019588, 195024485, 390048970, 780097940]

約数ペア:

[(1, 780097940), (2, 390048970), (4, 195024485), (5, 156019588), (10, 78009794), (20, 39004897)]