65680240

素因数分解:

$2^4\times 5^1\times {\mathrm{821003}}^1$

素因数の和:821016

約数の個数: 20

約数和(自身を含む): 152706744

約数和(自身を除く): 87026504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 821003, 1642006, 3284012, 4105015, 6568024, 8210030, 13136048, 16420060, 32840120, 65680240]

約数ペア:

[(1, 65680240), (2, 32840120), (4, 16420060), (5, 13136048), (8, 8210030), (10, 6568024), (16, 4105015), (20, 3284012), (40, 1642006), (80, 821003)]