81288400

素因数分解:

$2^4\times 5^2\times {\mathrm{203221}}^1$

素因数の和:203239

約数の個数: 30

約数和(自身を含む): 195296342

約数和(自身を除く): 114007942

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 203221, 406442, 812884, 1016105, 1625768, 2032210, 3251536, 4064420, 5080525, 8128840, 10161050, 16257680, 20322100, 40644200, 81288400]

約数ペア:

[(1, 81288400), (2, 40644200), (4, 20322100), (5, 16257680), (8, 10161050), (10, 8128840), (16, 5080525), (20, 4064420), (25, 3251536), (40, 2032210), (50, 1625768), (80, 1016105), (100, 812884), (200, 406442), (400, 203221)]