1999120

素因数分解:

$2^4\times 5^1\times {\mathrm{24989}}^1$

素因数の和:25002

約数の個数: 20

約数和(自身を含む): 4648140

約数和(自身を除く): 2649020

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 24989, 49978, 99956, 124945, 199912, 249890, 399824, 499780, 999560, 1999120]

約数ペア:

[(1, 1999120), (2, 999560), (4, 499780), (5, 399824), (8, 249890), (10, 199912), (16, 124945), (20, 99956), (40, 49978), (80, 24989)]