19680775

素因数分解:

$5^2\times {\mathrm{521}}^1\times {\mathrm{1511}}^1$

素因数の和:2042

約数の個数: 12

約数和(自身を含む): 24467184

約数和(自身を除く): 4786409

約数列:

[1, 5, 25, 521, 1511, 2605, 7555, 13025, 37775, 787231, 3936155, 19680775]

約数ペア:

[(1, 19680775), (5, 3936155), (25, 787231), (521, 37775), (1511, 13025), (2605, 7555)]