39620780

素因数分解:

$2^2\times 5^1\times {\mathrm{997}}^1\times {\mathrm{1987}}^1$

素因数の和:2993

約数の個数: 24

約数和(自身を含む): 83329008

約数和(自身を除く): 43708228

約数列:

[1, 2, 4, 5, 10, 20, 997, 1987, 1994, 3974, 3988, 4985, 7948, 9935, 9970, 19870, 19940, 39740, 1981039, 3962078, 7924156, 9905195, 19810390, 39620780]

約数ペア:

[(1, 39620780), (2, 19810390), (4, 9905195), (5, 7924156), (10, 3962078), (20, 1981039), (997, 39740), (1987, 19940), (1994, 19870), (3974, 9970), (3988, 9935), (4985, 7948)]