20405650

素因数分解:

$2^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{9491}}^1$

素因数の和:9546

約数の個数: 24

約数和(自身を含む): 38841264

約数和(自身を除く): 18435614

約数列:

[1, 2, 5, 10, 25, 43, 50, 86, 215, 430, 1075, 2150, 9491, 18982, 47455, 94910, 237275, 408113, 474550, 816226, 2040565, 4081130, 10202825, 20405650]

約数ペア:

[(1, 20405650), (2, 10202825), (5, 4081130), (10, 2040565), (25, 816226), (43, 474550), (50, 408113), (86, 237275), (215, 94910), (430, 47455), (1075, 18982), (2150, 9491)]