15887920

素因数分解:

$2^4\times 5^1\times {\mathrm{198599}}^1$

素因数の和:198612

約数の個数: 20

約数和(自身を含む): 36939600

約数和(自身を除く): 21051680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 198599, 397198, 794396, 992995, 1588792, 1985990, 3177584, 3971980, 7943960, 15887920]

約数ペア:

[(1, 15887920), (2, 7943960), (4, 3971980), (5, 3177584), (8, 1985990), (10, 1588792), (16, 992995), (20, 794396), (40, 397198), (80, 198599)]