18921020

素因数分解:

$2^2\times 5^1\times {\mathrm{397}}^1\times {\mathrm{2383}}^1$

素因数の和:2789

約数の個数: 24

約数和(自身を含む): 39850944

約数和(自身を除く): 20929924

約数列:

[1, 2, 4, 5, 10, 20, 397, 794, 1588, 1985, 2383, 3970, 4766, 7940, 9532, 11915, 23830, 47660, 946051, 1892102, 3784204, 4730255, 9460510, 18921020]

約数ペア:

[(1, 18921020), (2, 9460510), (4, 4730255), (5, 3784204), (10, 1892102), (20, 946051), (397, 47660), (794, 23830), (1588, 11915), (1985, 9532), (2383, 7940), (3970, 4766)]