20265950

素因数分解:

$2^1\times 5^2\times {\mathrm{409}}^1\times {\mathrm{991}}^1$

素因数の和:1412

約数の個数: 24

約数和(自身を含む): 37824960

約数和(自身を除く): 17559010

約数列:

[1, 2, 5, 10, 25, 50, 409, 818, 991, 1982, 2045, 4090, 4955, 9910, 10225, 20450, 24775, 49550, 405319, 810638, 2026595, 4053190, 10132975, 20265950]

約数ペア:

[(1, 20265950), (2, 10132975), (5, 4053190), (10, 2026595), (25, 810638), (50, 405319), (409, 49550), (818, 24775), (991, 20450), (1982, 10225), (2045, 9910), (4090, 4955)]