19871995

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{27793}}^1$

素因数の和:27822

約数の個数: 16

約数和(自身を含む): 28016352

約数和(自身を除く): 8144357

約数列:

[1, 5, 11, 13, 55, 65, 143, 715, 27793, 138965, 305723, 361309, 1528615, 1806545, 3974399, 19871995]

約数ペア:

[(1, 19871995), (5, 3974399), (11, 1806545), (13, 1528615), (55, 361309), (65, 305723), (143, 138965), (715, 27793)]