21450020

素因数分解:

$2^2\times 5^1\times {\mathrm{193}}^1\times {\mathrm{5557}}^1$

素因数の和:5759

約数の個数: 24

約数和(自身を含む): 45286584

約数和(自身を除く): 23836564

約数列:

[1, 2, 4, 5, 10, 20, 193, 386, 772, 965, 1930, 3860, 5557, 11114, 22228, 27785, 55570, 111140, 1072501, 2145002, 4290004, 5362505, 10725010, 21450020]

約数ペア:

[(1, 21450020), (2, 10725010), (4, 5362505), (5, 4290004), (10, 2145002), (20, 1072501), (193, 111140), (386, 55570), (772, 27785), (965, 22228), (1930, 11114), (3860, 5557)]