821492920

素因数分解:

$2^3\times 5^1\times {\mathrm{193}}^1\times {\mathrm{106411}}^1$

素因数の和:106615

約数の個数: 32

約数和(自身を含む): 1857953520

約数和(自身を除く): 1036460600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 193, 386, 772, 965, 1544, 1930, 3860, 7720, 106411, 212822, 425644, 532055, 851288, 1064110, 2128220, 4256440, 20537323, 41074646, 82149292, 102686615, 164298584, 205373230, 410746460, 821492920]

約数ペア:

[(1, 821492920), (2, 410746460), (4, 205373230), (5, 164298584), (8, 102686615), (10, 82149292), (20, 41074646), (40, 20537323), (193, 4256440), (386, 2128220), (772, 1064110), (965, 851288), (1544, 532055), (1930, 425644), (3860, 212822), (7720, 106411)]