18880655

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1\times {\mathrm{641}}^1$

素因数の和:826

約数の個数: 16

約数和(自身を含む): 23389344

約数和(自身を除く): 4508689

約数列:

[1, 5, 43, 137, 215, 641, 685, 3205, 5891, 27563, 29455, 87817, 137815, 439085, 3776131, 18880655]

約数ペア:

[(1, 18880655), (5, 3776131), (43, 439085), (137, 137815), (215, 87817), (641, 29455), (685, 27563), (3205, 5891)]