21151640

素因数分解:

$2^3\times 5^1\times {\mathrm{528791}}^1$

素因数の和:528802

約数の個数: 16

約数和(自身を含む): 47591280

約数和(自身を除く): 26439640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 528791, 1057582, 2115164, 2643955, 4230328, 5287910, 10575820, 21151640]

約数ペア:

[(1, 21151640), (2, 10575820), (4, 5287910), (5, 4230328), (8, 2643955), (10, 2115164), (20, 1057582), (40, 528791)]