20520105

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{80471}}^1$

素因数の和:80496

約数の個数: 16

約数和(自身を含む): 34763904

約数和(自身を除く): 14243799

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 80471, 241413, 402355, 1207065, 1368007, 4104021, 6840035, 20520105]

約数ペア:

[(1, 20520105), (3, 6840035), (5, 4104021), (15, 1368007), (17, 1207065), (51, 402355), (85, 241413), (255, 80471)]