81505040

素因数分解:

$2^4\times 5^1\times {\mathrm{1018813}}^1$

素因数の和:1018826

約数の個数: 20

約数和(自身を含む): 189499404

約数和(自身を除く): 107994364

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1018813, 2037626, 4075252, 5094065, 8150504, 10188130, 16301008, 20376260, 40752520, 81505040]

約数ペア:

[(1, 81505040), (2, 40752520), (4, 20376260), (5, 16301008), (8, 10188130), (10, 8150504), (16, 5094065), (20, 4075252), (40, 2037626), (80, 1018813)]