81841520

素因数分解:

$2^4\times 5^1\times {\mathrm{1023019}}^1$

素因数の和:1023032

約数の個数: 20

約数和(自身を含む): 190281720

約数和(自身を除く): 108440200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1023019, 2046038, 4092076, 5115095, 8184152, 10230190, 16368304, 20460380, 40920760, 81841520]

約数ペア:

[(1, 81841520), (2, 40920760), (4, 20460380), (5, 16368304), (8, 10230190), (10, 8184152), (16, 5115095), (20, 4092076), (40, 2046038), (80, 1023019)]