38780020

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{17789}}^1$

素因数の和:17907

約数の個数: 24

約数和(自身を含む): 82189800

約数和(自身を除く): 43409780

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 17789, 35578, 71156, 88945, 177890, 355780, 1939001, 3878002, 7756004, 9695005, 19390010, 38780020]

約数ペア:

[(1, 38780020), (2, 19390010), (4, 9695005), (5, 7756004), (10, 3878002), (20, 1939001), (109, 355780), (218, 177890), (436, 88945), (545, 71156), (1090, 35578), (2180, 17789)]