78136400

素因数分解:

$2^4\times 5^2\times {\mathrm{195341}}^1$

素因数の和:195359

約数の個数: 30

約数和(自身を含む): 187723662

約数和(自身を除く): 109587262

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 195341, 390682, 781364, 976705, 1562728, 1953410, 3125456, 3906820, 4883525, 7813640, 9767050, 15627280, 19534100, 39068200, 78136400]

約数ペア:

[(1, 78136400), (2, 39068200), (4, 19534100), (5, 15627280), (8, 9767050), (10, 7813640), (16, 4883525), (20, 3906820), (25, 3125456), (40, 1953410), (50, 1562728), (80, 976705), (100, 781364), (200, 390682), (400, 195341)]