31905520

素因数分解:

$2^4\times 5^1\times {\mathrm{398819}}^1$

素因数の和:398832

約数の個数: 20

約数和(自身を含む): 74180520

約数和(自身を除く): 42275000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 398819, 797638, 1595276, 1994095, 3190552, 3988190, 6381104, 7976380, 15952760, 31905520]

約数ペア:

[(1, 31905520), (2, 15952760), (4, 7976380), (5, 6381104), (8, 3988190), (10, 3190552), (16, 1994095), (20, 1595276), (40, 797638), (80, 398819)]