19727920

素因数分解:

$2^4\times 5^1\times {\mathrm{246599}}^1$

素因数の和:246612

約数の個数: 20

約数和(自身を含む): 45867600

約数和(自身を除く): 26139680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 246599, 493198, 986396, 1232995, 1972792, 2465990, 3945584, 4931980, 9863960, 19727920]

約数ペア:

[(1, 19727920), (2, 9863960), (4, 4931980), (5, 3945584), (8, 2465990), (10, 1972792), (16, 1232995), (20, 986396), (40, 493198), (80, 246599)]