20720905919

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{427579}}^1$

素因数の和:427659

約数の個数: 24

約数和(自身を含む): 25736895360

約数和(自身を除く): 5015989441

約数列:

[1, 7, 23, 43, 49, 161, 301, 989, 1127, 2107, 6923, 48461, 427579, 2993053, 9834317, 18385897, 20951371, 68840219, 128701279, 422875631, 481881533, 900908953, 2960129417, 20720905919]

約数ペア:

[(1, 20720905919), (7, 2960129417), (23, 900908953), (43, 481881533), (49, 422875631), (161, 128701279), (301, 68840219), (989, 20951371), (1127, 18385897), (2107, 9834317), (6923, 2993053), (48461, 427579)]