20878091

素因数分解:

${\mathrm{13}}^4\times {\mathrm{17}}^1\times {\mathrm{43}}^1$

素因数の和:112

約数の個数: 20

約数和(自身を含む): 24505272

約数和(自身を除く): 3627181

約数列:

[1, 13, 17, 43, 169, 221, 559, 731, 2197, 2873, 7267, 9503, 28561, 37349, 94471, 123539, 485537, 1228123, 1606007, 20878091]

約数ペア:

[(1, 20878091), (13, 1606007), (17, 1228123), (43, 485537), (169, 123539), (221, 94471), (559, 37349), (731, 28561), (2197, 9503), (2873, 7267)]