19681605

素因数分解:

$3^2\times 5^1\times {\mathrm{263}}^1\times {\mathrm{1663}}^1$

素因数の和:1937

約数の個数: 24

約数和(自身を含む): 34265088

約数和(自身を除く): 14583483

約数列:

[1, 3, 5, 9, 15, 45, 263, 789, 1315, 1663, 2367, 3945, 4989, 8315, 11835, 14967, 24945, 74835, 437369, 1312107, 2186845, 3936321, 6560535, 19681605]

約数ペア:

[(1, 19681605), (3, 6560535), (5, 3936321), (9, 2186845), (15, 1312107), (45, 437369), (263, 74835), (789, 24945), (1315, 14967), (1663, 11835), (2367, 8315), (3945, 4989)]