21088910

素因数分解:

$2^1\times 5^1\times {\mathrm{311}}^1\times {\mathrm{6781}}^1$

素因数の和:7099

約数の個数: 16

約数和(自身を含む): 38087712

約数和(自身を除く): 16998802

約数列:

[1, 2, 5, 10, 311, 622, 1555, 3110, 6781, 13562, 33905, 67810, 2108891, 4217782, 10544455, 21088910]

約数ペア:

[(1, 21088910), (2, 10544455), (5, 4217782), (10, 2108891), (311, 67810), (622, 33905), (1555, 13562), (3110, 6781)]