15640880

素因数分解:

$2^4\times 5^1\times {\mathrm{195511}}^1$

素因数の和:195524

約数の個数: 20

約数和(自身を含む): 36365232

約数和(自身を除く): 20724352

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 195511, 391022, 782044, 977555, 1564088, 1955110, 3128176, 3910220, 7820440, 15640880]

約数ペア:

[(1, 15640880), (2, 7820440), (4, 3910220), (5, 3128176), (8, 1955110), (10, 1564088), (16, 977555), (20, 782044), (40, 391022), (80, 195511)]