20807995

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{2039}}^1$

素因数の和:2214

約数の個数: 16

約数和(自身を含む): 27074880

約数和(自身を除く): 6266885

約数列:

[1, 5, 13, 65, 157, 785, 2039, 2041, 10195, 10205, 26507, 132535, 320123, 1600615, 4161599, 20807995]

約数ペア:

[(1, 20807995), (5, 4161599), (13, 1600615), (65, 320123), (157, 132535), (785, 26507), (2039, 10205), (2041, 10195)]