31999120

素因数分解:

$2^4\times 5^1\times {\mathrm{399989}}^1$

素因数の和:400002

約数の個数: 20

約数和(自身を含む): 74398140

約数和(自身を除く): 42399020

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 399989, 799978, 1599956, 1999945, 3199912, 3999890, 6399824, 7999780, 15999560, 31999120]

約数ペア:

[(1, 31999120), (2, 15999560), (4, 7999780), (5, 6399824), (8, 3999890), (10, 3199912), (16, 1999945), (20, 1599956), (40, 799978), (80, 399989)]