81506800

素因数分解:

$2^4\times 5^2\times {\mathrm{203767}}^1$

素因数の和:203785

約数の個数: 30

約数和(自身を含む): 195821048

約数和(自身を除く): 114314248

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 203767, 407534, 815068, 1018835, 1630136, 2037670, 3260272, 4075340, 5094175, 8150680, 10188350, 16301360, 20376700, 40753400, 81506800]

約数ペア:

[(1, 81506800), (2, 40753400), (4, 20376700), (5, 16301360), (8, 10188350), (10, 8150680), (16, 5094175), (20, 4075340), (25, 3260272), (40, 2037670), (50, 1630136), (80, 1018835), (100, 815068), (200, 407534), (400, 203767)]