21491061

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1\times {\mathrm{619}}^1$

素因数の和:856

約数の個数: 16

約数和(自身を含む): 29283840

約数和(自身を除く): 7792779

約数列:

[1, 3, 71, 163, 213, 489, 619, 1857, 11573, 34719, 43949, 100897, 131847, 302691, 7163687, 21491061]

約数ペア:

[(1, 21491061), (3, 7163687), (71, 302691), (163, 131847), (213, 100897), (489, 43949), (619, 34719), (1857, 11573)]