21495605

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1\times {\mathrm{401}}^1$

素因数の和:628

約数の個数: 16

約数和(自身を含む): 26396928

約数和(自身を除く): 4901323

約数列:

[1, 5, 71, 151, 355, 401, 755, 2005, 10721, 28471, 53605, 60551, 142355, 302755, 4299121, 21495605]

約数ペア:

[(1, 21495605), (5, 4299121), (71, 302755), (151, 142355), (355, 60551), (401, 53605), (755, 28471), (2005, 10721)]