19516240

素因数分解:

$2^4\times 5^1\times {\mathrm{243953}}^1$

素因数の和:243966

約数の個数: 20

約数和(自身を含む): 45375444

約数和(自身を除く): 25859204

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 243953, 487906, 975812, 1219765, 1951624, 2439530, 3903248, 4879060, 9758120, 19516240]

約数ペア:

[(1, 19516240), (2, 9758120), (4, 4879060), (5, 3903248), (8, 2439530), (10, 1951624), (16, 1219765), (20, 975812), (40, 487906), (80, 243953)]