78810220

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{28349}}^1$

素因数の和:28497

約数の個数: 24

約数和(自身を含む): 166698000

約数和(自身を除く): 87887780

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 28349, 56698, 113396, 141745, 283490, 566980, 3940511, 7881022, 15762044, 19702555, 39405110, 78810220]

約数ペア:

[(1, 78810220), (2, 39405110), (4, 19702555), (5, 15762044), (10, 7881022), (20, 3940511), (139, 566980), (278, 283490), (556, 141745), (695, 113396), (1390, 56698), (2780, 28349)]