28243640

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{6991}}^1$

素因数の和:7103

約数の個数: 32

約数和(自身を含む): 64186560

約数和(自身を除く): 35942920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 6991, 13982, 27964, 34955, 55928, 69910, 139820, 279640, 706091, 1412182, 2824364, 3530455, 5648728, 7060910, 14121820, 28243640]

約数ペア:

[(1, 28243640), (2, 14121820), (4, 7060910), (5, 5648728), (8, 3530455), (10, 2824364), (20, 1412182), (40, 706091), (101, 279640), (202, 139820), (404, 69910), (505, 55928), (808, 34955), (1010, 27964), (2020, 13982), (4040, 6991)]