21081865

素因数分解:

$5^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{3989}}^1$

素因数の和:4152

約数の個数: 16

約数和(自身を含む): 29111040

約数和(自身を除く): 8029175

約数列:

[1, 5, 7, 35, 151, 755, 1057, 3989, 5285, 19945, 27923, 139615, 602339, 3011695, 4216373, 21081865]

約数ペア:

[(1, 21081865), (5, 4216373), (7, 3011695), (35, 602339), (151, 139615), (755, 27923), (1057, 19945), (3989, 5285)]