20455580

素因数分解:

$2^2\times 5^1\times {\mathrm{419}}^1\times {\mathrm{2441}}^1$

素因数の和:2869

約数の個数: 24

約数和(自身を含む): 43076880

約数和(自身を除く): 22621300

約数列:

[1, 2, 4, 5, 10, 20, 419, 838, 1676, 2095, 2441, 4190, 4882, 8380, 9764, 12205, 24410, 48820, 1022779, 2045558, 4091116, 5113895, 10227790, 20455580]

約数ペア:

[(1, 20455580), (2, 10227790), (4, 5113895), (5, 4091116), (10, 2045558), (20, 1022779), (419, 48820), (838, 24410), (1676, 12205), (2095, 9764), (2441, 8380), (4190, 4882)]