19909955

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{1951}}^1$

素因数の和:2126

約数の個数: 16

約数和(自身を含む): 25906944

約数和(自身を除く): 5996989

約数列:

[1, 5, 13, 65, 157, 785, 1951, 2041, 9755, 10205, 25363, 126815, 306307, 1531535, 3981991, 19909955]

約数ペア:

[(1, 19909955), (5, 3981991), (13, 1531535), (65, 306307), (157, 126815), (785, 25363), (1951, 10205), (2041, 9755)]