20640944

素因数分解:

$2^4\times {\mathrm{139}}^1\times {\mathrm{9281}}^1$

素因数の和:9428

約数の個数: 20

約数和(自身を含む): 40283880

約数和(自身を除く): 19642936

約数列:

[1, 2, 4, 8, 16, 139, 278, 556, 1112, 2224, 9281, 18562, 37124, 74248, 148496, 1290059, 2580118, 5160236, 10320472, 20640944]

約数ペア:

[(1, 20640944), (2, 10320472), (4, 5160236), (8, 2580118), (16, 1290059), (139, 148496), (278, 74248), (556, 37124), (1112, 18562), (2224, 9281)]