12721475

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{3011}}^1$

素因数の和:3047

約数の個数: 18

約数和(自身を含む): 17087076

約数和(自身を除く): 4365601

約数列:

[1, 5, 13, 25, 65, 169, 325, 845, 3011, 4225, 15055, 39143, 75275, 195715, 508859, 978575, 2544295, 12721475]

約数ペア:

[(1, 12721475), (5, 2544295), (13, 978575), (25, 508859), (65, 195715), (169, 75275), (325, 39143), (845, 15055), (3011, 4225)]