39980840

素因数分解:

$2^3\times 5^1\times {\mathrm{999521}}^1$

素因数の和:999532

約数の個数: 16

約数和(自身を含む): 89956980

約数和(自身を除く): 49976140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 999521, 1999042, 3998084, 4997605, 7996168, 9995210, 19990420, 39980840]

約数ペア:

[(1, 39980840), (2, 19990420), (4, 9995210), (5, 7996168), (8, 4997605), (10, 3998084), (20, 1999042), (40, 999521)]