21587839

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{3889}}^1$

素因数の和:3970

約数の個数: 16

約数和(自身を含む): 27012160

約数和(自身を除く): 5424321

約数列:

[1, 7, 13, 61, 91, 427, 793, 3889, 5551, 27223, 50557, 237229, 353899, 1660603, 3083977, 21587839]

約数ペア:

[(1, 21587839), (7, 3083977), (13, 1660603), (61, 353899), (91, 237229), (427, 50557), (793, 27223), (3889, 5551)]