20281105

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{509}}^1\times {\mathrm{613}}^1$

素因数の和:1140

約数の個数: 16

約数和(自身を含む): 26303760

約数和(自身を除く): 6022655

約数列:

[1, 5, 13, 65, 509, 613, 2545, 3065, 6617, 7969, 33085, 39845, 312017, 1560085, 4056221, 20281105]

約数ペア:

[(1, 20281105), (5, 4056221), (13, 1560085), (65, 312017), (509, 39845), (613, 33085), (2545, 7969), (3065, 6617)]