7920400

素因数分解:

$2^4\times 5^2\times {\mathrm{19801}}^1$

素因数の和:19819

約数の個数: 30

約数和(自身を含む): 19029722

約数和(自身を除く): 11109322

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 19801, 39602, 79204, 99005, 158408, 198010, 316816, 396020, 495025, 792040, 990050, 1584080, 1980100, 3960200, 7920400]

約数ペア:

[(1, 7920400), (2, 3960200), (4, 1980100), (5, 1584080), (8, 990050), (10, 792040), (16, 495025), (20, 396020), (25, 316816), (40, 198010), (50, 158408), (80, 99005), (100, 79204), (200, 39602), (400, 19801)]