21971020

素因数分解:

$2^2\times 5^1\times {\mathrm{263}}^1\times {\mathrm{4177}}^1$

素因数の和:4449

約数の個数: 24

約数和(自身を含む): 46325664

約数和(自身を除く): 24354644

約数列:

[1, 2, 4, 5, 10, 20, 263, 526, 1052, 1315, 2630, 4177, 5260, 8354, 16708, 20885, 41770, 83540, 1098551, 2197102, 4394204, 5492755, 10985510, 21971020]

約数ペア:

[(1, 21971020), (2, 10985510), (4, 5492755), (5, 4394204), (10, 2197102), (20, 1098551), (263, 83540), (526, 41770), (1052, 20885), (1315, 16708), (2630, 8354), (4177, 5260)]