20987020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{55229}}^1$

素因数の和:55257

約数の個数: 24

約数和(自身を含む): 46393200

約数和(自身を除く): 25406180

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 55229, 110458, 220916, 276145, 552290, 1049351, 1104580, 2098702, 4197404, 5246755, 10493510, 20987020]

約数ペア:

[(1, 20987020), (2, 10493510), (4, 5246755), (5, 4197404), (10, 2098702), (19, 1104580), (20, 1049351), (38, 552290), (76, 276145), (95, 220916), (190, 110458), (380, 55229)]