21257015

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{2083}}^1$

素因数の和:2258

約数の個数: 16

約数和(自身を含む): 27658848

約数和(自身を除く): 6401833

約数列:

[1, 5, 13, 65, 157, 785, 2041, 2083, 10205, 10415, 27079, 135395, 327031, 1635155, 4251403, 21257015]

約数ペア:

[(1, 21257015), (5, 4251403), (13, 1635155), (65, 327031), (157, 135395), (785, 27079), (2041, 10415), (2083, 10205)]