20731405

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{1021}}^1$

素因数の和:1188

約数の個数: 16

約数和(自身を含む): 25901568

約数和(自身を除く): 5170163

約数列:

[1, 5, 31, 131, 155, 655, 1021, 4061, 5105, 20305, 31651, 133751, 158255, 668755, 4146281, 20731405]

約数ペア:

[(1, 20731405), (5, 4146281), (31, 668755), (131, 158255), (155, 133751), (655, 31651), (1021, 20305), (4061, 5105)]