20899660

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9587}}^1$

素因数の和:9705

約数の個数: 24

約数和(自身を含む): 44296560

約数和(自身を除く): 23396900

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9587, 19174, 38348, 47935, 95870, 191740, 1044983, 2089966, 4179932, 5224915, 10449830, 20899660]

約数ペア:

[(1, 20899660), (2, 10449830), (4, 5224915), (5, 4179932), (10, 2089966), (20, 1044983), (109, 191740), (218, 95870), (436, 47935), (545, 38348), (1090, 19174), (2180, 9587)]