81900080

素因数分解:

$2^4\times 5^1\times {\mathrm{1023751}}^1$

素因数の和:1023764

約数の個数: 20

約数和(自身を含む): 190417872

約数和(自身を除く): 108517792

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1023751, 2047502, 4095004, 5118755, 8190008, 10237510, 16380016, 20475020, 40950040, 81900080]

約数ペア:

[(1, 81900080), (2, 40950040), (4, 20475020), (5, 16380016), (8, 10237510), (10, 8190008), (16, 5118755), (20, 4095004), (40, 2047502), (80, 1023751)]