1980400

素因数分解:

$2^4\times 5^2\times {\mathrm{4951}}^1$

素因数の和:4969

約数の個数: 30

約数和(自身を含む): 4758872

約数和(自身を除く): 2778472

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 4951, 9902, 19804, 24755, 39608, 49510, 79216, 99020, 123775, 198040, 247550, 396080, 495100, 990200, 1980400]

約数ペア:

[(1, 1980400), (2, 990200), (4, 495100), (5, 396080), (8, 247550), (10, 198040), (16, 123775), (20, 99020), (25, 79216), (40, 49510), (50, 39608), (80, 24755), (100, 19804), (200, 9902), (400, 4951)]