77799980

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{9511}}^1$

素因数の和:9929

約数の個数: 24

約数和(自身を含む): 163796640

約数和(自身を除く): 85996660

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 4090, 8180, 9511, 19022, 38044, 47555, 95110, 190220, 3889999, 7779998, 15559996, 19449995, 38899990, 77799980]

約数ペア:

[(1, 77799980), (2, 38899990), (4, 19449995), (5, 15559996), (10, 7779998), (20, 3889999), (409, 190220), (818, 95110), (1636, 47555), (2045, 38044), (4090, 19022), (8180, 9511)]