20918261

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{457}}^1\times {\mathrm{503}}^1$

素因数の和:980

約数の個数: 16

約数和(自身を含む): 25853184

約数和(自身を除く): 4934923

約数列:

[1, 7, 13, 91, 457, 503, 3199, 3521, 5941, 6539, 41587, 45773, 229871, 1609097, 2988323, 20918261]

約数ペア:

[(1, 20918261), (7, 2988323), (13, 1609097), (91, 229871), (457, 45773), (503, 41587), (3199, 6539), (3521, 5941)]