21124550

素因数分解:

$2^1\times 5^2\times {\mathrm{647}}^1\times {\mathrm{653}}^1$

素因数の和:1312

約数の個数: 24

約数和(自身を含む): 39412656

約数和(自身を除く): 18288106

約数列:

[1, 2, 5, 10, 25, 50, 647, 653, 1294, 1306, 3235, 3265, 6470, 6530, 16175, 16325, 32350, 32650, 422491, 844982, 2112455, 4224910, 10562275, 21124550]

約数ペア:

[(1, 21124550), (2, 10562275), (5, 4224910), (10, 2112455), (25, 844982), (50, 422491), (647, 32650), (653, 32350), (1294, 16325), (1306, 16175), (3235, 6530), (3265, 6470)]