31281520

素因数分解:

$2^4\times 5^1\times {\mathrm{391019}}^1$

素因数の和:391032

約数の個数: 20

約数和(自身を含む): 72729720

約数和(自身を除く): 41448200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 391019, 782038, 1564076, 1955095, 3128152, 3910190, 6256304, 7820380, 15640760, 31281520]

約数ペア:

[(1, 31281520), (2, 15640760), (4, 7820380), (5, 6256304), (8, 3910190), (10, 3128152), (16, 1955095), (20, 1564076), (40, 782038), (80, 391019)]