19918960

素因数分解:

$2^4\times 5^1\times {\mathrm{248987}}^1$

素因数の和:249000

約数の個数: 20

約数和(自身を含む): 46311768

約数和(自身を除く): 26392808

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248987, 497974, 995948, 1244935, 1991896, 2489870, 3983792, 4979740, 9959480, 19918960]

約数ペア:

[(1, 19918960), (2, 9959480), (4, 4979740), (5, 3983792), (8, 2489870), (10, 1991896), (16, 1244935), (20, 995948), (40, 497974), (80, 248987)]