21129950

素因数分解:

$2^1\times 5^2\times {\mathrm{269}}^1\times {\mathrm{1571}}^1$

素因数の和:1852

約数の個数: 24

約数和(自身を含む): 39472920

約数和(自身を除く): 18342970

約数列:

[1, 2, 5, 10, 25, 50, 269, 538, 1345, 1571, 2690, 3142, 6725, 7855, 13450, 15710, 39275, 78550, 422599, 845198, 2112995, 4225990, 10564975, 21129950]

約数ペア:

[(1, 21129950), (2, 10564975), (5, 4225990), (10, 2112995), (25, 845198), (50, 422599), (269, 78550), (538, 39275), (1345, 15710), (1571, 13450), (2690, 7855), (3142, 6725)]